For the twins it was that they were Chaotic Evil and it showed.  They ate a puppy.  It was a powder keg all around because the alignment spread of the party was 2x LG, NG, CG, CN and then two CE characters show up and the antipaladin and the paladin obviously had immediate problems because, well, paladin and antipaladin.<br/><br/>And I understand what you're saying about no tool being evil but undead are literally evil by default and there's reasons for that.  And Ian is pretty attractive, I made sure his Cha was higher than his Wis and Wis is his spellcasting attribute.  Very pretty-boy type.  Androgynous, even.