Undertale doesn't refer to them (frisk and chara) their pronouns. The game doesn't say it explicitly and sans refers to them as kid a couple of times and asirel always refers to chara by name so like??????? I always thought as a 11/12 year why that they don't have a gender and today I was like,, " oh shit Toby made them nonbinary AJBDEJSJDNDJSO"