Ryuusei: Genki Okawa (Yu☆Gi☆Oh! Zexal Second)
Koyuki: Koutarou Nishiyama (Kiznaiver)

Tooru Shirota: Youji Ueda (JoJo no Kimyou na Bouken (TV))

Koyuki: Koutarou Nishiyama (Kiznaiver)

Tooru Shirota: Youji Ueda (JoJo no Kimyou na Bouken (TV))

Servamp adapts the manga series drawn by Strike Tanaka. Hideaki Nakano (Aoharu x Kikanjuu) will direct the adaptation at animation studio Brain's Base.
Source: Official Twitter
