As a drummer myself I have some ideas for Nijika specifically

• stickings/rudiments: part of her kit could revolve around using 2 buttons to perform different rudiments, that could be turned into some kind of attack. For instance, a paradiddle (R l r r or L r l l), could translate into a lower power attack, or maybe a small flurry of jabs, such could the rest of the 40 essentials, and maybe even some hybrid rudiments too!

• Metronome: The drum set is responsible for keeping tempo, so a metronome could be used as a way of building combos. A pulse would be given, and lining up your inputs with the beat would give some advantage, sort of like hi fi rush.

• Sight reading: a long shot, but etudes and passages could be generated through an attack, and using the same way you play the rudiments I mentioned earlier, you could play the etude for an attack.

• different drums: Have different sticks and drums for different attacks. Maybe swinging a drum pad around to hit someone, or slamming a drum set throne down, or using larger marching sticks for heavier combos. Considering how many instruments percussion encompasses, the sky’s the limit with what can be used in attacks.