First appearance: Battle 2
Age: 13
Height: 140cm
Weight: 32kg
Type: Dou
Type: Katsujin Ken
Martial Arts: None

Shirahama Honoka is Kenichi's younger sister, who cares for her brother greatly, often competing with Miu for his attention. The second time she visits the Ryozanpaku dojo, she shows Apachai and Shigure how to properly make tea, which impresses them. Honoka soon becomes good friends with the two masters and consequently visits the dojo regularly to play with them.

Honoka has a similar hairstyle to that of her brother Kenichi, being short brown hair except she has no fringe in the front. She typically wheres striped shirts or her school uniform or dresses. Miu describes her as being very cute for her age, but in reality, she is much younger looking than her age.

Honoka is friendly and kind towards others. She loves her big brother very much and enjoys watching his training and is worried over how hard he has it over their. She enjoys hanging around Tanimoto Natsu and thinks of him as another big brother (as Tanimoto thinks of her as his deceased little sister).

She has a bit of a mischievous side, often following her brother to the dojo that he trains at and believing he's going through cruel training she tried to get him to come home. She even broke into his room and tends to annoy him because she likes being with him. She has a bit of a jealousy towards Miu, who she calls "Titsy" due to her figure, believing her to be the only reason Kenichi stays at the dojo, which isn't completely true as he just wants to become stronger to protect his loved ones.

She tends to lose her temper when upset and leaves in crying fits such as when Kenichi refused to go home and left upset. She tends to be impressed by her father when he tries to do something over dramatic, often believing it to be the right thing to do, especially with anything to do with Kenichi.

She enjoys hanging around Apachai and Shigure, whom Honoka plays board games with them most the time and teaches them minor things they are unaware how to do such as how to make tea. She knows some level of martial art moves due to her watching her mother teach her some techniques.