“Cater is bright, positive, reads the room, and is a good upperclassman to everyone. But at the same time he will step back and observe situations from a distance. So he has two sides: the cheerful, “Yay!” -type upperclassman side is more obvious, but he also genuinely considers the people around him.
He can seem a bit sharp or indifferent at times, but he has a passionate heart, a strong core, and is a truly charming character with striking contrasts.
One memorable part was Cater using his unique magic, ‘Split Card,’ to create clones. I recorded a different voice for each clone, each with different emotions. It was a lot of work, but thanks to the support of the other voice actors it was really fun to do.
Personally, I feel Cater is slightly different from myself. I’m shy and have to work to overcome it, so I admire his ability to get along with anyone. But the other voice actors tell me, ‘You’re a gyaru, so you’re perfect for Cater’ (laughs). I approach recordings with a Cater mindset.”
– Kobayashi Tatsuyuki, Nikkei Entertainment (2025)
“People often tell me things like, ‘You’re such an extrovert,’ or ‘You give off a bit of a gyaru vibe,’ and I’m grateful when they say, ‘You’re a perfect fit for Cater.’
But in reality I’m actually shy, overly conscious of others’ reactions, and more on the introverted side. So acting as freely and effortlessly cheerful as Cater doesn’t come naturally to me.
Early in the game recordings I was often told, ‘You sound a bit stiff.’
From there I experimented with ways to relax and spent more time connecting with Cater’s personality, gradually deepening my understanding of him. Over time, through thinking ‘How would Cater act in this situation?,’ again and again, I finally began to grasp his lightheartedness.
After so many game recordings I think a kind of maternal instinct had started to emerge in me toward the characters (laughs). Toward Riddle and the rest of the dorm I began to feel like, ‘They’re my cute underclassmen I want to protect.’ So going back to the beginning, to portray Cater again when he was still in that ‘strategic maneuvering’ stage was honestly a little painful for me…
To voice Jamil Viper, Futaba Kaname-kun apparently participated in an animation recording for the first time in his life.
He told me, ‘My first line in the anime is just ‘Nn’.’ (laughs). Starting with a line that’s just a breath of air is quite rare.”
– Kobayashi Tatsuyuki, Animedia magazine (2025)
“At first I played him as someone who interacts with everyone equally without discrimination, but sometimes he looks at everyone with a cold gaze, and even when he’s cheerfully livening up the atmosphere it is probably because he just doesn’t want things to get troublesome.
As for the Housewarden, as he starts to seem to be becoming a bit dangerous, it’s not that (Cater) isn’t worried, but since smoothing out problems is his priority he doesn’t go so far as to try to actually fix things.
The problems we hold deep in our hearts, even if we think we’ve resolved them, they can come back and attack us again. Just a small failure can trigger a flood of memories of past regrets or painful things, and it keeps you awake at night.
I used to be the type to overthink everything but then a senpai told me, ‘don’t think about unnecessary things,’ and now I strictly follow that rule. What’s done can’t be undone, so I try to wake up with the morning sun and think positively about what’s ahead. That kind of lightness is maybe an influence of Cater Diamond, too (laughs).”
– Kobayashi Tatsuyuki, DaVinci magazine (2025)
“Cater is cheerful, great at communication, and can quickly get along with anyone.
On the other hand, he thinks about a lot of things in his heart, and often chooses not to say them out loud after reading the room.
I feel like that kind of duality is actually something familiar that everyone has, so in a sense he might be the character that people living in the present day can relate to the most.
I’ve performed as Cater for many years, but when I returned to his starting point again, I thought, ‘Huh? Was he always this hard to pin down?’ (laughs). I even realized something new: he is surprisingly straightforward.”
– Kobayashi Tatsuyuki, Nikkei the Television (2025)
In August 2026, the official Twisted Wonderland Twitter account published the following comments from Kobayashi on the character song/dorm song soundtrack and karaoke box implementation (source):
>> Memories from Recording
For “Obedience” I remember really enjoying both thinking about things like, “How would Cater express this song?” before recording and actually getting to sing it! For “What’s This?” all of the lyrics are in English, so there were some challenging parts during recording such as the pronunciation and the parts where the song is particularly fast. But I was very happy to be able to be involved with this song as Cater’s voice actor!
>> What should fans pay attention to in the songs you participated in? In “Obedience” everyone’s individuality really comes through in each person’s assigned part, so I’d like everyone to listen closely for that. “What’s This?” appeared during the winter, but its fast tempo makes it really fun to get into, so I hope everyone will listen to it and enjoy it throughout the whole year!
>> Which song would you like to sing at karaoke?
I want to sing “Obedience”! There are a lot of members, so it might be difficult to sing alone, but…! (laughs) I think it would be fun to sing as each member! Personally I think Cater’s line 「ピンク纏ってフラミンゴ」 feels really good to sing, so I hope everyone else will have fun singing it too, and sing it in a cool way!
>> A message for the fans, please.
To everyone who always supports Twst, thank you very much! I am the voice of Cater Diamond, Kobayashi Tatsuyuki. The Character Song Collection is being released! It contains lots of songs overflowing with each dorm’s individual character, as well as many songs that you’re already familiar with from the game. I’d be very happy if you would add this playlist to your everyday lives, and enjoy it!
Twisted Wonderland Reference Note 