Kazuki has red eyes that her whole family inherits, short black hair that goes down to her neck with a blue headband on the top. She seems to be wearing her school uniform which is displayed as teal and black. She wears a black skirt with long, black socks to her black boots.
Unlike Hazuki, she is the "cool" type who doesn't show her emotions on the surface, but she is actually quite timid and prone to worrying. Kazuki has strong physical abilities and Shorinji Kempo is her strong point. She is talented in cooking although it was seen on episode 1 that she skipped cooking class. She actually really loves and cares for her parents and siblings but due to them not getting along well, she became distant.
Hazuki Ferrari - her oldest sister is always a bit worried about her sisters, so she tends to correct things and explain out what Kazuki is feeling.
Hozuki Ferrari - she seems to be strange to her younger sister, but actually worries about her often at times. She complains about living in the Galilei mecha and always felt left out because she claims Hozuki is being all great herself.
Herman Hans - when she was worried about Hozuki, she hurriedly finds Hans for help. She also explains herself out to him and thoroughly befriends him.