Sai

Whoah boy

skill 1: 2 coins slashing Skill 2: either 2 or 3 coins slashing skill 3: 3 coins (unbreakable)(?)

Clashable counter (?), reload mechanic. He loses his funny hat on reload.

Appears to have an "inner strength" mechanic, similar to [canto 8 character] alongside a similar bullet mechanic, this may mean that this ID has Prey (clash power//damage down), Severing (conditional slash fragility), or empowered ammunition.

Inner strength appears to have 2 "stages" similar to Red Eyes Ryoshu ID, having red glow at stage 1 and yellow at stage 2.

Skill 4 (Stage 1): 5 coins, single target. Skill 4 (Stage 2) 5 coins, attack weight 3.

we know that he has Tremor in his kit because you can hear the Tremor burst sounds in the video.

Soldato II of the Thumb Sinclair 000:

Skills appear to be all Piercing damage. 2 Coins skill 1, 2 Coins skill 2, 3 Coins skill 3 skill 3 Variant changes animation but appears to keep coin count constant.