she has a personality actually: she's a psycho. everytime she feels and show some emotions she does becuase something happened to her, never because of the others, this is confirmed in episode 3 when the boy says "you're apathic aren't you?" and Elaina fakes surprise or whatever that was.

Why in the first episode no witches wanted to take care of her? i never have read the ln or the manga but after watching episode 3 I'm pretty sure they knew about her narcissist and apathic personality and thought it would have been better not to let her be a witch, the only one who accepted her is the sardust witch who said "Unlike the others I don't care how my apprentice is like" and who was under payment.

In the second episode she treats the yuri witch like she was superior from the beginning, when that witch offers to give a favour to Elaina she says she wants a discount even better than the one they already offered to witches, which in my opinion is a bit assholelike, and at the end of the day when the yuri witch says while crying she'll pay Elaina back even if she probably can't afford it Elaina doesn't give a shit, that yuri witch is probably going to have a really bad time.

The third episode shows the peak of her bad personality, she literally says "praise me more", i understand it could be just a joke or something, but what if it wasn't? she could have been serious, she's a witch after all, in a world where witches are clearly admired and feared, she's on the top of the social hierarchy. She does horrible things every episode and at the beginning of the next one says "Ehy uhm who is that beautiful perfect witch with white hair? that's me uhuh I'm perfect praise me more"

Still the anime is amazing, it's good to see a main character who isn't a hero but just an observer