I just realized I never responded to you Kanami about if the ability is to make certain appliances stop working before falling a sleep. The answer is yes, and it also actually applies well to my characters that I have in mind for this roleplay. 
But essentially the power would start out pretty slow, just a small malfunction here and there, which eventually leads the devices to their own impeccable  doom... Doom!
Why did I just picture the teacher from Invader Zim saying that? >.>
Any who~
Would you like me to go into more depth of explaining things?