I downloaded it earlier today on a whim, dunno if I'm going to keep playing it. I generally found most of the SMT humdrum of collect demons/personae, fuse for stronger demons/personae, turn based beat a boss, go back to collecting boring and just kept going for the story. Dx2 seems to have voiced cuteness, which is quite something for a mobage, but is its story actually worth checking out at least?
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Also not to worry, I got a Red Thor from the beginner 5* ticket and that's apparently the worst there is, so I won't be sticking around for gacha luck, at least.