>shares a room with his older brother
>all of his body language screams male, even the twirly ballet spin
>owns a can of "ice-e's body spray for boys: spicy pizza flavor"
>girls aren't usually pranksters of kris's level
>girls aren't usually asocial of kris's level
>kris is a unisex name but is more commonly used for males
>him being male makes the dreemur family mirror the holiday family
>dark world clothes are literally varik's armor
>frisk and chara, the other main human protagonists, have been surreptitiously called boys in the past, see: murderboy variable, original release of the undertale artbook before the reprint
>obsessed with knives, moss, and dragon titties
>pizzapants goes "LOOK AT THIS HOT CHICK I SCORED PHWOAR" to him, something a guy would only do with another guy
Kris isn’t non-binary, and he doesn’t want to be non-binary. Toby is forcing that identity upon him. Toby knows this and is doing it despite his gut feeling telling him he shouldn’t—tricking himself with a sunk cost fallacy and fearing backlash for doing the right thing.

He likes to act like the player is the only one who can mistreat and use the characters, but the creator definitely can, too. Each character has an essence, an identity, and a will of their own that speaks to the author after they’re created and defined. It’s called character agency and character autonomy, and any author worth their salt will respect it above all else.

Toby is choosing to ignore Kris’s autonomy, disregard his natural male identity, and thereby do the very thing the meta narrative seems critical of the player for potentially doing. The insistence that all characters intuitively refer to Kris with they/them pronouns in all contexts also overexerts his influence as the author, destroying believability and character autonomy across the entire setting, thereby mortally wounding the overall integrity of the work and our suspension of disbelief.