I'm not trying to defend Riki any here, but having played a Twilight of my own, let me say that it's a dangerous dance, keeping things balanced with a sparklebutt. She wants to learn, and in a panfandom game, she'll be given opportunities to learn. Throw in the whole Element of Magic thing and she can learn, which ends up with her ending up in a kinda overpowered Power Copier state without even meaning to be.

It's even more exaggerated when she's now got two panfandoms under her belt with Mayfield and MLJ; that said I think there's something to be said about willingly refraining from giving her power that she doesn't need to work for. As an example, the Kamen Rider/SMT4 stuff might be a smidge excessive, I feel, but at the same time, the things Lucifer taught her are less overwhelming because she's still expending effort and energy TO learn them.