Glasses wearing nice guy mentor's are always villain's in disguise. Add on top of that he gets in the way of a harem and there is norway he is not totally evil.
This sadly reminds me there are actual people out there that starve themselves to fit a characters profile. Get a freaking hamburger for crying out loud.
Imagine being the original artist that went thru all that detailed work drawing those panels only to have it almost completely covered over by giant ass kanji. I'd beat someones ass for that.