Hmm. Water-based lube, not good for metal parts. Silicone-based lube, not good near silicone components.

Yeah! He was keeping the sword in his bedroom! That's a private place! Only Marigold is allowed to go in there, trip over other stuff on the floor and land face-first on the unsheathed blade!

Inappropriateness of appropriating personal lube aside (inappropriation?), having a naked blade lying around where someone can fall on it is a Bad Idea(tm) and it's lucky that the person who did has a face that can be repaired out of a parts bin. Also, panel three May-rage is excellent.

Well, at least a slightly more appropriate wrong use than Raven's.

Yeah, you definitely don't want to borrow or lend something like "personal lube". Ewww.

Is that Hatsune Miku on the wall?