Oh, we've been in the monster world for around half a year, I believe? I think that means we should expect Algaecwif to have given birth by the time we return to the human world. Wonder if that means anything.
I'm also wondering if it's about time for the Chekhov's gun that is MC's mark to rear it's head. Even though others have said otherwise, I think when MC returns to the human world, he's gonna run into Indra, get into a scuffle with him, forcing him to evolve, but still losing. Maybe the mark can be the "not perfect win" condition insurance. Then again, some people have suggested that the requirements for the fifth evolution include beating opponents that are stronger than us, and losing to Indra might mean we fail them. Hmm.