I need help...Well, sort of. (caution; spoilers included)

Any ideas for how I can kill off my character? (well, she has to die; *SPOILERSPOILERSPOILER* all the Akatsuki dies in the end...OH SHIT SPOILERS!)

Her name is Hishin, she's (duh) in Akatsuki...Deidara's and Sasori's partner. I want her to die before hoặc after *SPOILERSPOILERSPOILER* Deidara dies (MOAR spoilers), but I dunno HOW to kill her. Any suggestions?