Got to rank 1 in arena, no idea if continuing to battle people is worthwhile. Probably won't be able to do it again as F2P so at least I have done it once.
With all the tickets from missions/challenges and arena I managed to pull 1 5*, Rinko Akiyama. From reading the Japanese wiki she seems to be one of the worst one's. Still, better than all the other 2* rubbish I was getting.
Does anyone know if there is an English wiki/Discord?
EDIT: And does anyone know how to do weekly missions 2 and 3? I have defeated the bosses loads of times and haven't completed the missions once.