Rae

Rae is a young human witch girl who has been transported to Ooo by unknown means. She is still learning about Ooo, and travels far and wide to gain as much knowledge as possible.

Appearance
Rae wears a navy-blue or sometimes rose-red hoodie and black jeans, but when her hood is down, it is seen that she has shoulder-length pale brown hair which turns black when she is mad, upset or feeling any other negative emotions. Her eyes are violet or some may say lilac.

Marceline
Rae has gone to Marceline's cave, and has found an ally, and some may say a friend, in the Vampire Queen.

Princess Bonnibel Bubblegum
Rae has travelled to the Candy Kingdom, where she met Princess Bubblegum, Peppermint Butler, and other Candy people.

More to come soon...
(You guys are free to add on if you want.)