Are we still allowed to post logic help without guessing? I have ideas but no guess.

"slice" could be pie, pizza, OH! Hmmmmmmmm.....Barret referred to the upper sectors of Midgar as that "$^%@! floating pizza". Slice could refer to a sector, then. But nobody ever offers anybody else a sector of Midgar, ha. could refer to reactors, one per slice, and they work together to feed the sister ray which "cooks" stuff.

I don't actually think that's it. I think I'm way off with where I went with that...but it's a line of thought.

slice could also refer to the action of slicing.

I have this vague idea that it's about an NPC giving you something that they find useless. ...I don't think I've said anything here that obligates you as a riddler to respond. Just throwing ideas out there.

Also your riddles sound like four-line haiku. hahah