Girls Bravo/WMG

Yukinari is the ancestor of Simon
Think About It. They both have blue hair. They are both Woobies.
 * Who the heck is Simon?
 * He's from Gurren Lagann.

Kirie is the cause of Yukinari's allergy
It's obvious that she is. Kirie had be Yukinari's "friend" when they were little. but judging by all the horrible things she had done to him, It's no wonder that Yukinari is afraid of women. Nice Job Ruining Yukinari, Kojima
 * The girls in Yukinari's school are no better than Kirie. When he accidentally walks into the girls' locker room, you'd expect them to just yell him to get out (or punch him away at worst). Instead, they drag him in, layeth the smacketh down on him and then throw him out, leaving him on the ground.

Kanako Miyamae and Yukinari Sasaki are each other's opposite gender counterpart/equivalent
Kanako Miyamae is the protagonist of Maria Holic and shares many similarities with Yukinari.
 * They both have allergy to their opposite gender due to being bullied by boys/girls.
 * They both get mocked for their height (He gets called "Chibinari" because he's small, while she is nicknamed "Eiffel Tower" because she's tall)
 * They are both Butt Monkeys and have Keitaro-esque resiliance/immortality. Proof below:
 * Yukinari: - Kanako:
 * They are both treated badly by the person they live with (Kirie for Yukinari, Mariya for Kanako)