Kei Tsuzuki

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Kei Tsuzuki
都築 圭

Kei Tsuzuki-sprite.png

Kei Tsuzuki T.png
Kei Tsuzuki-sm.png

"......Me, an idol...?"
Member of
Character Data
Age: ??
Height: 182 cm
Weight: 54 kg
Shoe Size: 27 cm
Birthday: April 2
Blood Type: O
Hobbies: None
Skills: Piano
Writing Hand: Left
Horoscope: Aries
Hometown: Berlin
Ex-Job: Pianist
Attribute: Mental
Voice Actor: Shunichi Toki

The mysterious young man who loves music more than anything!

Kei Tsuzuki is one of the Idols available to produce at 315 Productions. He is a pianist who formed the Idol Unit, Altessimo, with Rei Kagura.

Profile[edit | edit source | hide | hide all]

Kei is a former composer. Vague, elusive, and with age unknown, he carries an air of mystery about him. Though his talent in music is prodigal, he cares for nothing else. Kei has no confidence in standing center stage and is far from proactive in his job duties. However, since working with Rei, this attitude has begun to change¹.

Resume[edit | edit source | hide]

Reasons for Becoming an Idol
So I can live. Music is all I have.
Personal Motto
“Poco a poco.” Go little by little, in all things.
Comments for the Future
I want to see it with my own eyes. The potential within my music, that moment of life within the sounds born from this very hand. I have decided to become an idol for that very reason, but...Well, let’s just see how this plays out.
Comments about Unit Members
Rei’s taste in violins is magnificent, is it not? Why? He could make even a trite pop song sound as though it came from the heavens! ...Alas, he’s far too uptight... If only I could get him to loosen up ju~st a bit...

Story[edit | edit source | hide]

Translated Commus[edit | edit source | hide]

Birthday Comments[edit | edit source | hide]

See: Kei Tsuzuki/Birthday
Character Commu
Kei Tsuzuki-icon.png How curious. Why am I being asked about my age so often today... Ahh, it's my birthday. I see. So how old am I, actually? Well... I don't know the answer to that myself.

Character Commu
Kei Tsuzuki-icon.png My birthday? Ah, I see... So... would you happen to know the month and day today? It is such a bother to remember the date.
Rei Kagura-icon.png Today is April 2nd! I guess wishing Kei-san good tidings through words was pointless... Would you like to listen to me play your celebration song?

Character Commu
Kei Tsuzuki-icon.png Yes, today is my birthday. Hehe, I could not possibly forget after you and Rei constantly kept reminding me of it. My age? I am... Hm? Goodness, how old am I?

Character Commu
Kei Tsuzuki-icon.png Fufu... birthdays certainly are interesting. I can hear a myriad of sounds around me. Just listening to it all so carefully has made me quite sleepy... good night... zzz...
Rei Kagura-icon.png Ah, don't 'zzz' right now please! I practiced so hard to play your birthday song too... Please wake up, Kei-san!

Character Commu
Kei Tsuzuki-icon.png I wonder how many times I've had someone celebrate my birthday like this. 1, 2, 3... all this counting has made me tired. I'll be sleeping right here, so please continue counting for me. Good night...

Character Commu
Kei Tsuzuki-icon.png Thank you for another magnificent birthday song this year. Your sound is much more gentle and comfortable compared to last year. I can feel how much you've improved, Rei-san.
Rei Kagura-icon.png I am able to grow because you are together with me, Tsuzuki-san. Please allow me to play one more song as my token of thanks for what you do for me every day.

Character Commu
Kei Tsuzuki-icon.png is my birthday? I still don’t keep up with these kinds of things, but I am delighted to have people here celebrating for me. Thank you, Producer san.

Character Commu
Kei Tsuzuki-icon.png Aah….how wonderful..your song on your violin is lovely as well, Rei san. I feel as if a warm spring breeze is around me.
Rei Kagura-icon.png I’m happy to hear that. Happy Birthday, Tsuzuki san. Here’s to another wonderful year.

Character Commu
Kei Tsuzuki-icon.png Oh, it's my Birthday? Another year has gone by since my last one huh... Do I want anything? Um, let's see... Could you sing me a Birthday song? I'll be the conductor.

Character Commu
Kei Tsuzuki-icon.png Rei san your sound has changed a bit. The color has become even lovelier, making it delicate. I'm happy for your growth as if it were my own self.
Rei Kagura-icon.png Well it's because you've stayed by my side, Tsuzuki san. I doubt I would have been able to do it without you. Here's to a great Birthday.

Side Memories[edit | edit source | hide]

See: Kei Tsuzuki/Side Memories
Translator: Natalia Clow
Character Commu
Rei Kagura-icon.png

We have a request for an interview with Tsuzuki-san?
I see, our next job is ​to take part​ in a variety show…

Kei Tsuzuki-icon.png

Hmmm. I see, so they want to get closer to the mystery of my personal life… don’t they?
I don’t think I have anything to hide, so why not?

Rei Kagura-icon.png

"Why not" he says, as if it was somebody else's business…
Is it ok... to broadcast Tsuzuki-san’s private life​?
And before that, let's try to avoid making trouble for the program's staff…

Kei Tsuzuki-icon.png

I don't think you need to worry.
Producer-san is coming with me, so we'll figure something out.
Right, Producer-san?

Character Commu
Staff We look forward to working with you today. Recording will start soon.
For now, the only suggestion we have is for you to act as you always do.
We want your most natural expression, so relax and don't worry about the camera.
Kei Tsuzuki-icon.png Understood, I'll behave as usual… in fact, I think I'll go find that sound.
Kei Tsuzuki-icon.png

This sofa looks comfortable enough to sleep on. Good night…

Kei Tsuzuki-icon.png

Hmm, there's a keyboard on display, maybe I should play for a while?
♫ ♪ ♫
Oh, I've gathered a crowd… Thats fine. I'll continue playing.

A few hours later…
Kei Tsuzuki-icon.png Fufu, thanks to Producer-san coming along, I've been able to do all kinds of different things.
Staff Y-you're very relaxed. Excuse me, is Tsuzuki-san always this relaxed?
Producer-icon.png He's always like this.
Kei Tsuzuki-icon.png Oh? I hear a very attractive sound… over there.

Character Commu
Kei Tsuzuki-icon.png

There's such a beautiful band in this festival. Now that I think about it, Rei-san mentioned something about it.
The sound of people's steps, the sizzling of the griddles, laughter… this place is full of interesting sounds.

Staff Are those interesting sounds? Right now you're not working as a composer, but…
You're still greatly dedicated to music, do you have a reason?
Kei Tsuzuki-icon.png

Well… it's for Altessimo's performance… right?
There's nothing wrong with knowing all kinds of sounds.
…Well, I think I'll go look around the festival.

Kei Tsuzuki-icon.png

Ah, here… they're selling cotton candy.
…Excuse me, I think today's recording will have to stop here… Goodbye.

Staff Tsuzuki-san's face was looking pale… is he not feeling well?
I apologized to the staff and went after Tsuzuki-san.

Character Commu
Kei Tsuzuki-icon.png

…I'm sorry about earlier. I had an impulsive reaction as soon as I saw something I didn't like.
I hate cotton candy: As soon as I saw it I lost my spirits.
…It's already dark outside… but I want to stay here a bit more, can I?

Producer-icon.png Aren't you sleepy?
Kei Tsuzuki-icon.png

A little, but right now I want to listen to some music.
…If it's ok with you, you can have one of my earphones and we can listen together.

Producer-icon.png Of course, let's listen together.
Through the headphones, a piano melody started playing. Seems like it was a mellow song…
Kei Tsuzuki-icon.png

…This song is Gounod's "Ave Maria". It's wonderful, isn't it?
I hadn't seen cotton candy in a long time, so when I did I felt like listening to this song.
This song… is one of the songs that started me on the path of music.

Character Commu
Kei Tsuzuki-icon.png

One afternoon, when I still lived in Berlin:
A window in the apartment I used to live in opened to a conservatory… from there, I listened to the music.
Thanks to that music, I was guided into the hall where I met an "angel."
That person, an aspiring musician… was practicing on the piano.
From that day onwards, the two of us played music together all the time.
With that person's piano and my voice, we were able to form a connection during a very happy time in my life… my youth.
And so, for days, it was only us playing music. Around that time, Christmas became a very special time for me.
In Germany, Christmas is a very lively holiday. That day, we were roaming around the city.
We went to a church to listen to the chorus and to different scenarios to see various events…
We pooled our money to buy food and shared it, as if we were poor.
…Truth is, that person liked cotton candy a lot and we always bought it.
…Now that I think about it, that person was like cotton candy themselves, very soft…
I was pulled into the world of music thanks to that person. They were very important for me, but…
I wonder why that happy time had to be over so suddenly.
…After a certain day, that person never showed up in the concert hall again.

Character Commu
Kei Tsuzuki-icon.png

As far as I heard, he was successful in his music career and left Berlin.
Far too much time had passed before I found that out.
It was like a thread had suddenly snapped, I even thought it might be a dream.
Since that day… cotton candy has been a special thing for me.
It reminds me of important times, and how I lost someone important for me.
The angel I met in Berlin, the song I made just for one idol. In the end, even my mother…
Every person that has been important for me, in the end, they always disappear abruptly.
Just like cotton candy… you put it in your mouth, and it melts away, until it disappears.
That's why, every time I see it, a feeling of loneliness takes over me…

…I wonder if you, too, will suddenly disappear.

Of course not, I said, as I shook my head strongly.
Kei Tsuzuki-icon.png

…Thank you, I'm glad to hear you say such a thing, Producer-san.
Perhaps, if you hadn't found me that day, I…
Perhaps I'd still be alone, under the rain.
It's thanks to you that I'm here, that I've been able to enjoy music and form bonds through it.
The one that makes my world make sense… is you.

Character Commu
Kei Tsuzuki-icon.png

Fufu, perhaps we've spoken for too long, I'm getting tired.
After meeting you, I've experienced a lot of "first times."
This might be the first time we've spoken like this.
It must be because of this strange charm of yours. Yes, that strange charm… Ah.
Don't move, stay just like that… looking at you is making a melody flow.

Don't stand up… let me listen to you breath. The proof that you're alive is right here.
What are you ashamed of?… Please, stay put for a little while.
Alright, you can move a bit: that's because even that is part of your sound.
Let me hear all of you… yes, just like that.
Hmm, good. Thanks to you, I think I'll be able to write a good song, fufu.

Are we recording tomorrow as well? I'll make sure not to be a bother.

Producer-icon.png You don't need to worry about that.
Kei Tsuzuki-icon.png That's right… thank you for everything, Producer-san.

Character Commu
Host …Alright, and that's the end of the section of our show Getting Closer to the Mystery of Tsuzuki-san.
Well, instead of clearing up the mystery it's become even deeper, but…
His piano improvisation I was expecting, but, do you really have no intention to keep composing music?
Kei Tsuzuki-icon.png …About that…
Rei Kagura-icon.png

Right now he's not composing, as he's working as a member of Altessimo.
But singing a song, just like composing or performing it, all have the same purpose.

Kei Tsuzuki-icon.png

…That's right, just like Rei-san says. Right now, I'm an idol… a member of Altessimo.
Please, listen to our song, performed by Altessimo.

Kei Tsuzuki-icon.png

(…Once again, Rei-san has helped me out.)
(Rei-san's voice is irreplaceable, it's wonderful.)
(I've experienced many farewells, but…)
(Being here, like this… having met him, is very reassuring.)

Character Commu
Rei Kagura-icon.png The variety show was broadcasted without issue and your popularity has increased, I'm glad…
Kei Tsuzuki-icon.png Rei-san, can I have a minute? I'd like your help to prepare a surprise for Producer-san.
Rei Kagura-icon.png …A surprise? If you don't want them to find out, we'd rather go somewhere else. Let's go.
Kei Tsuzuki-icon.png …Please take a look at this.
Rei Kagura-icon.png

(This… it's Tsuzuki-san's new song! …How strange, a lot of notes have been struck through)

It's a very quiet and happy song, however, I find it strange that you've crossed out so many notes.

Kei Tsuzuki-icon.png

Up until now, everything I've composed has been thanks to the flow of inspiration, making things up as I go.
If it's ok with you, Rei-san, would you like to practice with me?

Rei Kagura-icon.png

So far, you've kept this secret from Producer-san…
Is this perhaps a song for Producer-san?

Kei Tsuzuki-icon.png

So, you realized without me saying anything at all, as expected… this song also displays the current "me".
Altessimo is made up of you and me, if we're not together, we're not complete. That's why…

Rei Kagura-icon.png Of course I will, since you're asking for it, I'll gladly help!
Kei Tsuzuki-icon.png Thank you… fufu, since we're together, Rei-san, I'm sure we'll make a great song.

Character Commu
Kei Tsuzuki-icon.png

Hello, Producer-san. I'm sorry for calling you so suddenly, thanks for coming.
Truth is… I've written a song with all the feelings I have day by day for you, Producer-san.
I'm not sure if this is a way to thank you, but that's why we called you here, to show you.
And it's not only for you, but also for Rei-san, who is always helping me out…
Actually, if it weren't for you, I would have never met Rei-san.
So you were the one that gave me Altessimo, a new motivation to live.
If you ever left me behind, that'd be very troublesome for me.
So I'd like to keep relying on you two. How does that sound?

Producer-icon.png Of course!
Rei Kagura-icon.png There was no need to say it, I would have never even thought of abandoning you.
Kei Tsuzuki-icon.png

Thank you, both of you… now, I'd like you to enjoy this song until the end.
…Alright, let's start the performance. Come on, Rei-san.

(At 315 Production, there's Producer-san, Rei-san, and everyone)
(Yes, I'm not alone anymore… I have a lot of precious people.)
(Poco a poco, I will keep going forward at my own pace along with everyone else…)

Game[edit | edit source | hide]

Event and Gacha History[edit | edit source | hide]

Click to view SideM event and gacha

Discography[edit | edit source | hide]

Etymology[edit | edit source | hide]

  • The name Kei means "gemstone" (圭).
  • Kei's surname Tsuzuki means "metropolis, capital" (都) (tsu) and "fabricate, built/build, construct" (築) (zuki).

Trivia[edit | edit source | hide]

  • Kei falls asleep easily, sometimes mid-conversation. This is because he often stays up late into the night composing music.
  • Kei dislikes cotton candy.
  • Kei doesn't eat much and only consumes a lot of water. Other idols are worried for his health and nutritional intake as a result.
  • Kei sometimes slips German into his speech. When talking about cats, he calls them katzen, and he refers to his grandfather as Opa.
  • Kei's image motif in Altessimo is a yellow butterfly.
  • Kei has the highest in-game vocal stat at 9, a stat that no other idol shares.

Gallery[edit | edit source | hide]

Kei Tsuzuki
Card DataEventsGacha Card DataEventsGacha
ConversationsMagazinesSide Memories ConversationsIdol Memories
Kei TsuzukiRei Kagura