Man, I'm loving this manga, the wait really kills me. It's very solid and it's nice to come back after a year and read it from the beginning. The beast king arc really moved me, and I want to see where they go with this flood arc now.
However, if there's a character that makes 0 sense to me, it's got to be Tiera. Shin could give her the moon and the stars as a sign of his friendship, and she would still shit on him. Thinking back from the beginning, he... is basically the CEO of the company that she's effectively the cash register woman for, cured her of a dangerous and miserable lifelong curse, gave her their version of millions of dollars, provides her room and board in his own super-home, guarantees her safety just by being around, created and is in charge of her master, and gives her that planet's greatest equipment.
I absolutely don't mean to insinuate that she should be part of some kind of harem, please god no, but I really don't understand why after all those things... her only interaction with him is as some kind of half-ass comedy straight-man who complains when he performs miracles. There's quite a few well developed characters in this manga that get so little screen time... and then we have this incredibly flat gag character that shows zero interest in all the revelations the NPC's would get by interacting daily with someone like Shin, and instead just complains.
Also, while fighting an overwhelming number of very powerful enemies that would slaughter the town and her, Shin heads in to do exactly the job he is supposed to, and she complains that he might overdo it? I wonder what she would say if the Players weren't around...? Probably "Please god, send someone here to overdo it." That would be rich.