well.. lemme try to explain u xD

1- u need Charlotte
2- u need eva ( not sure xD)
3- u need a space craft.
4- u need the thing u use for make syrups xD
5- u need a coconut basin.

when u have all this things.. u go on the moon.. and u will see a rabbit.. talk to him and five him what he asks.. when done.. u go in oslya.. at the lake in the cave.. and do the quest there.. and u'll get Angela :)