The first Akira I met was incredibly cool and mysterious. He had a playful sense of humor, I suppose, but his form of teasing was less... goofy, I suppose? He just had this aura of someone who had his shit together.

[Though, hmm... His brow furrows as he tries to articulate this more.]

Of course, one of the Akiras is just a little kid, but he's not a dumbass. He is a precious gift who deserves all the love in the world. He has an advanced reading level and a strong interest in dinosaurs.

[Nothing dumbass about that!]

I would say 'dumbass energy' doesn't necessarily mean stupid so much as... the demeanor. How goofy a given Ren or Akira is.