That is mainly because Seymour has to be the "big bad" of the game. There is AFAIK also a variable which is for how much Seymour likes Lena. Seymour can get smitten by her.I think it'd be more correct to say Lena is smitten with Seymour if her disposition towards him is high, but this isn't necessarily reciprocal -- Seymour frequently makes use of a sprite literally named "evil" around her, even in this scenario.