Glasya (and her daddy Asmodeus) are supposed to be extremely attractive, with certain devilish features (Asmodeus has no wings (or tail?), though, for some reason, although he seems to lack pupils instead...), though; they look very nice, until they break and get angry or do something bad
But yeah, Glasya was also done with MS Paint

(I can't put this much detail into all my stuff...)
Anyway, yeah, huge spiders are basically modeled after the various wolf spiders (who also don't use webs, but they do use silk to line their holes).
Manikus: sea lions - didn't they have them in 2e, too? Was there any difference between the 1e and 2e versions?