Serina in manual
|Also Known as||Hiyu Serina|
|Hobbies||Writing love letter|
|Fighting Style||Command Sambo|
|'Fighting Techniques||Serina's Command List|
|'Voice Actor||Akiko Sekine|
She is a girl in love with Kai Himurao.
Serina Hiyu is an ordinary high school student that is in the 11th grade. She is known to have has feelings for only one guy, Kai Himurao. She tries her best to be recognized by Kai.
She notices Kai is interested in martial arts as a skillful fighter. So she trains herself to be a skillful fighter just like him in order to get Kai to notice her. In fact, she does become the 2nd best fighter as him.
Even though Kaoru Yaegashi shows he has interest feelings for her, but she does not return his feelings to him.
She receives a letter of an upcoming tournament and agrees to go to show Kai her fighting techniques and get a chance to tell him how she feels.