Mizuho Asano

is the older sister of Keigo Asano. She is the 24th student council president at Karakura 1st High School. and evidently works to handle multiple school affairs, including the local Kendo Club.

Personality
She likes guys with shaved heads, which is why she shows a strong affection towards Ikkaku Madarame, tending to refer to him as Darling and allowing him and Yumichika Ayasegawa to stay in the Asano family's house. Mizuho possesses an exceedingly violent and bossy nature, as seen by the way she reacts to even the slightest of comments as well as the treatment of her brother Keigo.

Arrancar arc
She sends her brother Keigo out to get a drink for her. When he returns late she angrily starts to yell at him about how long he's taken until she sees the two strangers her brother has brought home with him. Keigo then asks her if they can stay thinking that she'll say no, only for her to say yes. During a kendo tournament, she forces Ikkaku to participate, only for it to end before he gets to fight, leading to a non-fatal massacre of both sides just to get back at her ex-boyfriend who dumped her .She later gives Ikkaku a shirt which both Yumichika and Rangiku find hilarious. Mizuho along with Keigo return home after school and she seeing Rangiku thinks that she has the wrong door, only to realize that she did indeed have the right door and asks who Rangiku is and what's she doing there.

In [http://bleach.wikia.com/wiki/Cry_of_the_Soul%3F_The_Rug_Shinigami_is_Born! a stand alone anime-exclusive episode], Ikkaku and Yumichika stay at her place again while they are hunting an escaped experiment. During the time, she demonstrates that she's willing to throw him out for having hair. However, both characters experience development as she learns to overlook this when he saves her, and he looks on her more kindly.