Do the members of K/DA have powers in universe?

It is unclear to me what exactly K/DA is capable of in their universe and exactly what they all are. I mean Akali is likely a capable fighter in universe with mixed martial arts and able to use a kama so I could belive her being pretty good as a potential assassin miss hip hop ninja however

what about Ahri, fans suspect her tails are real so I assume she is a real ninetails but is she still adept at magic maybe more so than classic Ahri not risking eating souls. Or is the charm spell at the camera all visual effects in universe too?

Is Eveylnn still secretly a demon just she actally learned to appreciate other emotions than lustful agony, the missing male celebrities are kinda suspicious but her value of friends makes it obvious she is more human than the original agony's embrace

And finally Kai'sa does she have high grade weapons tech or a void suit that just is more benign and feeds on music and dance moves or is she the one who just lacks powers in this cannon and just shoots fireworks or has fancy special effects

Or is it all supposed to be head cannon?