My god Murasame is such a mess of a character.
He has so many traits that most of them conflicts with each other and never properly sticks to any of them except of the "Hating MC because Big Boobs" trait.
1. Introduced as an aloof character that has calm an analytical mind.
2. Shows a misogynistic trait(specifically towards busty girls) that NEVER goes away.
3. Shows a caring motherly/onee-chan trait.
4. Becomes a character that rushes into enemies.
Bonus idiocy points:
1. Despite their team desperately needing new members, he constantly insults someone they themselves asked to join at first encounter.
2. Doesn't want MC to interact with the kids, and yet brings the MC into the area instead of a different arranged meeting place.
3. Attacks and insults the MC after MC defended the kids from the enemy's attacks, going as far as shifting his target away from said enemy that launched the attack.
Author just stop adding more stuff into Murasame, you're making it worse.