KLK Fighter 4

Fiber Meter: Charges over the course of battle. Possibly certain actions provide more charge for each character? When past half-percent, characters can activate Fiber Mode, which either grants new abilities or boosts existing ones. Maybe a mechanic where too much damage while in Fiber Mode will forcibly deactivate it?

Ryuko: Rushdown character. Fast, aggressive, but also kinda fragile. Fiber Mode: Senketsu Senjin(?). Attacks deal DoT, break guards more easily, light attacks deal more damage
Satsuki: Charge character, defensive. Slow walk speed, but above-average dash. Long strikes, floaty in the air, possible use of minions. Think Parasoul. Fiber Mode: Junketsu Senpu. Grants airdashing, increases dash speed and distance, decreases start-up and charge  on most of her moves.
Mako: Joke character. Attacks are all various poses from the hallelujah speeches. All her moves are relatively weak but come out fast with little frames, making her unpredictable. Fiber Mode: Fight Club. Completely different character. Powerful melee attacks with good range and a projectile attack. Fiber Meter charges twice as quickly as any other character, but also drains quicker.
Gamagoori: Typical grappler character. High health and high damage but slow af. Can use Shackle Regalia to convert damage received into Fiber Meter, but going in and out of it take a while. Fiber Mode: Scourge Regalia. Allows for whip moves that knock opponent towards Gama for easy grapples or serve as long-range grapples. Think Swamp Thing in Injustice 2
Inumuta: Very fast, very agile, but weak af. Specializes on okizeme, but generally has difficulty actually knocking the opponent down in the first place. Fiber Mode: Probe Regalia. Unlocks a counter-attack that turn Blue Nerd invisible and teleports him behind/above/away from the opponent. Doesn't become visible again for five seconds unless he attacks.
Nonon: Standard zoning character. Fights using a mini version of the Symphony Regalia Presto, which launches a number of keep-away projectiles and defensive music sheet beams. Fiber Mode: Del Capo. Lasers. Lasers that stunlock.
Uzu: Mix-up character, with a lot of different sword moves that have to be blocked high or low. Also can use heightened senses to counterattack against certain attacks. Fiber Mode: Lightsaber shinai ups attack speed, heightened senses can speed up Uzu's reflexes to the point of slowing the opponent, a la Flash from the Injustice series.