Genos didn't saw Oska for that long, as he arrived in the final stages of Woohurst madness, so he won't really realize what's so strange. I mean, the whole multi-dimensional rift is weird enough, why is not going where planned still weird /grumps/

He'll still investigate around, and check the library... and the hot springs, because of how familiar these might look.

Also, can be a portable cat-heater. Or a cat-napper spot. He might even ramp the heat generated by his body a bit, if asked nicely.

Because cats.