hmmm the only gacha Im playing is genshin so I'll just focus on the playstyle/gimmick

Kingston ✦✦✦✦✦: Main DPS // Sword // Electro
For the E skill: Sth like Candace/beidou sheild/counter but... like the fire emblem characters in smash bros bc its so fun to time a counter correctly hehe
For the Ult: sth like Hu Tao's/Xiao where their hp drains when they use their ults bc the gimmick would be Than... possession but it gives some stat boost and makes him stronger while draining his HP while attacking... so trade off...

And maybe a special dash like mona/ayaka but he turns into a lil shadow and zoom...

Ruth ✦✦✦✦✦: Support or Sub DPS // Bow // Cryo
For the E skill: some kind of ability that pulls nearby enemies toward her like sucrose/kazuha e and applies cryo
For the Ult: Kinda like Xing qiu's ult where she summons ice arrows and they attack in unison with the on-field attacker but it's a rebound shot... so her arrows will ricochet off enemies as long as there's more than one and deal extra damage the more enemies there are around

I can't think of playstyles for the other two x'D maybe I'll come up w sth

Y'know, I was gonna say that Elio wouldn't really fit into the Gacha mold, since he's partly based on me, but then I remember... Pokemon Masters exists... unfortunately 🙄😒.

So in the spirit of things, as Elio is a Pokemon-centric OC, I'll properly answer this ask.

Elio's naturally a five-star (⭐⭐⭐⭐⭐) unit who excels in being an all-rounder: his stats are balanced while having a few traits that additionally make him good support on a lot of teams he's put on; he essentially fits into all three roles (Strike, Support, Tech), depending on the player's setup for a given battle. However, when exclusively paired with his other <Sync Pair> alts, he has a few unique functions - two of which can be selected by the player:

🔲Chain attacks occur - dealing additional crit damage to all opposing units.

🔲Status moves' usage is increased - depending on how many different alts are on the team.

🔲Secondary effects are always activated.

🔲The move slots needed for each move are decreased by one.

Furthermore, all of his variations are capable of becoming <6⭐ EX> units, explosively boosting their capabilities - making the player's gameplay much more viable than before. In short, he's one of the more "busted" units in the game.