Aoi and Momoiro Amagase/Tropes

A-G
Always Identical Twins: Sans different coloured outfit and different hair length.

Badass: They're descended from Gai, did you expect anything less?
 * Action Duo
 * Badass Adorable/Killer Rabbit: Look at them.
 * Cute Bruiser
 * Badass Longhair: Momoiro.
 * Beware The Nice Ones/Beware The Quiet Ones: They're both really nice, playful children, Aoi is even meek. Doesn't mean they will not kick your ass.
 * Little Miss Badass
 * Person Of Mass Destruction: Shooting Star Rockman, anyone?
 * Pint-Sized Powerhouse: Oh boy.
 * Wai-Fu: Runs in the family.

Creepy Child: One can view Aoi as this.

Different As Night and Day

Elemental Powers:
 * An Ice Person: Aoi, complete with the quiet personality.
 * Playing With Fire: Momoiro, and what a hot-head she is.
 * Personality Powers

H-P
Hypocritical Humour: Nika, the "devil woman", calls Momoiro a "devil child".

Identical Twin ID Tag: The twin's hair lengths differ.

Improbably Weapon User: They use candy and toys as weapons.

Innocent Blue-Eyes: Where do they get them from?

Knife Nut: Their Shikai are a knife each.

Meaningful Name: Aoi and Momoiro mean blue and pink, which are the colours the twins wear.

Palette Switch: Defines them well.

Q-V
Spider-Sense: Aoi, despite being one of the quieter, more withdrawn cast members, seems to be much more aware than anyone else, able to sense alot of different things about different people, including, but not limited to, their mindset, if they are Eldritch Abominations, etc.

Terse Talker: Aoi is this all the way.

Twincest: Word of God on one part confirms it will happen. Suck it, Trebek.

Twin Banter: Momoiro often speaks full out, hot-blooded sentences that Aoi repeats one word of in a Creepy Monotone.