KENNY does double-duty as a . . . . I got nothing.
What the hell! This doesn't look like anything! It kiiiiind of looks like beautiful (美) but split in half, and the two halves are being stabbed with a fork. So the fork does double-duty: it can help you eat salad, or it can help you cut a beautiful person in half.
|( xxx と ｙｙｙ を ) か*ねる||
to combine ｘｘｘ and ｙｙｙ, to double as (i.e. she's a maid who doubles as a bodyguard)
a second-job. moonlighting.
use as A and B
to use something both as A and B.
idly, stand by
見兼ねてxxx 見殺し 勘弁出来ない たまるか