Tsukasa is cold, stern, and brutal in battle, going as far as to assault Kenichi without even giving him a moment to defend himself and attacking with everything she has. She seems to enjoy a good fight, as she smiled most of the time in her fight with Miu and believed that she, Kenichi, and Ryozanpaku would fall on that day. She's also arrogant, claiming Kenichi can't defeat her partner Kurando if he can't defeat her. However, she's not entirely arrogant, as she knew that Miu would be a strong opponent due to her being the Elder's granddaughter but still displayed a cocky side. She is an OVA exclusive character.

History's Strongest Disciple Kenichi
Shirahama "weak legs" Kenichi is a typical high school student with typical problems: he's frequently bullied and tends to run away in the face of his enemies. Things change when Kenichi meets Furinji Miu, whose grandfather runs a dojo; and not knowing what he's getting himself into, he signs up to become a disciple. As Kenichi's life-threatening training continues and he becomes more and more powerful, he inadvertently becomes the target of the deadly gang called Ragnarok. With mental and physical challenges ahead, can Kenichi survive his encounters with Ragnarok, or will the masters of his dojo get to him first?