Dark Aisha?

 

In Season 2 and in "The Shadow Phoenix", we see Bloom turn dark through the power of magic. This angry, sullen, watch-me-kill-all-my-friends-happily version of her was dubbed "Dark Bloom." Two seasons later, after Nabu's death, Aisha goes to the side of the not-so-good. However, she rarely, if ever, is referred to as "Dark Aisha" or "Dark Layla" by the fandom, even if people refer to this period as "when she went dark."

Anyone who has seen Buffy the Vampire Slayer can likely see the similarities between Aisha and Season 6 Willow... if not, I won't spoil it. However, I will say that it makes me consider that the main reason our fairy of waves isn't always classified as "Dark Aisha," might have to be because her appearance never changes. While working with Nebula and the Vengeance Fairies, she looks just like a Winx. However, Dark Bloom had a huge appearance change, her outfit darkening and becoming less soft and feminine, as did Buffy's Willow (her hair and eyes turn black).

Does a change of appearance or use of dark magic make a dark character? Or do actions and emotions? What do you think?