Ryo-Ohki from Tenchi Muyo
In some parts of the story, Ryo-Ohki is an artificial life created by the mad scientist Washu. Ryo-Ohki is a cat/bunny like being that can turn into a space ship. That’s right, Ryo-Ohki is a shapeshifter. In some parts of the canon, she also has a humanoid form. Also, she likes carrots. She really, really does. How can you not like a something that is completely adorable that can also turn into a spacecraft? It’s most likely the best idea that was ever created in anime. Probably.