?

Endless chaoticly creative energy

Older bro shounen character energy.

Like, not the main character, but the chill dude who's buddies with the protag and probably a year or two older than they are, gives them some kind of wise emotional speech when they're having their Darkest Hour.

Does this make Quinn the main character

big fed up retail worker ready to destroy capitalism energy

Oddly enough, Quinn also has older sib energy, but it's more the 'shows up briefly to deliver some super ominous line while doing the scary shiny glasses thing' kind. Not evil, but definitely doing something plot relevant that no one's gonna find out about until like ten episodes in.

Quinn once killed our entire family to test his ability

who is the younger sibling them

then*

There was an accident with a time machine and now we're not sure

Anyways my theory was that the answer would be "Big brother energy" so

I think I got it more or less right