What are some good names for these?

1. Ok, so I wanna make a new YouTube account where I do music videos in anime style... Idk what my username should be tho... Help!! 2. Also, I need help with making a name for my story. It goes where there are four chosen ones: the children of the sun, the moon, water, and mother nature and the daughter of mother nature loses her memory and lives a normal school life until the other three chosen ones find her and she starts regaining her memory... Help I've been trying to make up a name for days but I couldnt think up of one... The best I could come up with is Chosen and that's it...