I'm not against tsunderes on principle but Beris combine it with being incredibly crass and vulgar, and unlike Mika she doesn't have a speck of charm to make up for it. Furthermore she roams around Ushris floor, which is easily the most annoying level of the labyrinth, meaning I had to fight her way too much. She isn't particularly difficult but because of her combo that she spams constantly she takes much longer than the others to deal with, as if I hadn't enough reasons to hate her already  
 
Hell, even her trap tile temptation scene is much longer than the others! Just because she can't fathom why someone wouldn't be attracted to her dumb ass.