1) Make him fall in love 2) Make him fall in love with an already mated character 3) Make him crazy/join Kili 4) Make him under the influence of Kili, to the point that, even should Kili die, he will still have multiple-personality-disorder. (What I'm doing)
Will this help?
This guy is so evil you could put him in between two slices of bread and call him an evil sandwich.
When your heart gets pierced with arrows, don't rip them out and pierce those around you in retribution for your hurt. You'll only unnecessarily wound others and bleed to death yourself. — LadyMysterio