It's Mpbuso, the foreign exchange middle school student, here in America on her lapsed student visa. No one really liked Mpbuso, she was ever the social outcast, shunned and ridiculed from the "A" crowd all the way down to the social misfit nerds/geeks.
And, after reading Stephen King's "Carrie" our evil little exchange student decided that she would get even with her hated fellow American students. Anger and revenge seethed and roiled in Mpbuso's angry heart. So it came to pass that Mpbuso decided to revenge herself by ruining each and every happy photo with her evil eyed stare. Then, she simply disappeared from campus. No one picked up her diploma. No one cared. No one noticed she was gone. Except when everyone noticed her in their pictures. . . *shudder*
Check out your own phone camera pictures. Is Mpbuso in one of them?