There's a new file in the latest Star Rail beta that seems to indicate skins will have "special actions," what could these actions be? I don't know exactly as there's no data, so this is purely me theorizing so don't take it as a "leak" but maybe different animations on a per-skin basis.
On a side note, can they stop teasing us with skins...
I leave it up to all of your personal interpretations until we know for certain 👍
Also it could've been added last week too, I don't remember been too busy to track changes.