Yuzuki's twin brother. He introduced Yuzuki to the game, and was the one to give her the deck containing Hanayo. Kazuki is one of the few non-Selectors to know about WIXOSS' secret.

He seems to be unaware of Yuzuki's feelings.

In the popular game Wixoss, there are special cards called LRIGs that few players know about — cards that possess personalities and wills of their own. Ruuko is a teenage girl who just found one of these rare cards. Now, she can use her LRIG to battle in a strange, dark plane of existence. If she wins, her wishes will be granted — but what happens if she loses?<br><br>(Source: Funimation)

__Height:__ 164 cm
__Hobbies:__ darts, driving, games, karaoke
__Skills & Abilities:__ acrobatics, karate, singing

[Profile (YU-RIN Pro)](https://yu-rin.com/pro-man/kobayashi-yusuke) | [Twitter](https://twitter.com/yusuke032510)

On January 1st, 2025, it was announced that he had gotten married to voice actress [Yumi Uchiyama](https://anilist.co/staff/106784/Yumi-Uchiyama).

__Non-Anime Roles:__
~! - Arslan in "Arslan Senki x Musou" (VG) (Japanese)
- Itaku in "Utawarerumono: Futari no Hakuoro" (VG) (Japanese)
- Opoona in "Warriors All-Stars" (VG) (Japanese)
- Ranmaru Mori in "Sengoku Night Blood" (VG) (Japanese)
- Sigurd in "Guardian's Violation" (VG) (Japanese)
- Takeru Akabane in "Code of Joker Edge" (arcade game) (Japanese)
- Terumi Niida; Kaoru Shishibara in "Prince of Stride" (VG) (Japanese)
- Tokugawa Ieyasu in "Hana Oboro ~Sengoku Den Ranki~" (VG) (Japanese)
- Tōshirō Shinano in "Touken Ranbu -ONLINE-" (VG) (Japanese) 
- Byleth in "Fire Emblem Three Houses-" (VG) (Japanese)
- Kalpas in "Honkai Impact 3rd" (VG) (Japanese)
- Xavier in "Love and Deepspace" (VG) (Japanese)!~

Kazuki Kurebayashi