Chibi Nobu is a small-enemies version of the Koha-Ace character Demon Archer a.k.a. Nobu.
There are 3 variants for Chibi Nobu with the other two being the Silver and Gold versions.
Chibi Nobu acts up to 2 times per turn. Her normal attack is a rifle shot, while her critical hits are a charge attack while carrying a Hiragumo tea kettle, then returning to her position via a hole in the ground. She has the skill Cannon ready! (砲擊用意) that charges her NP gauge by 1 tick.