Mana (Yumana)

She is an alien girl who crash-landed on Earth.

Lost most of her memories when she crash landed.

Then she was picked up by someone and now lives with her older-goldfish-sister and family. 

Often appears in Wonval's youtube.

(they are friends but mana just works as a sidekick sometimes too)

* she really means a lot to me so i won't appreciate if you copy her