Xbooru - 1girl 2010s 2018 2d 2d (artwork) animated skeleton blue body blue breasts blue clothes blue clothing blue santa costume breasts cleavage curvy body digital media (artwork) ectobody ectobreasts female female only female sans genderswap genderswap (mtf) looking at viewer monster nsfwgarbagedump one eye closed rule 63 sans sans (undertale) santa costume santa hat skeleton solo solo female undead undertale undertale (series) video games waving waving at viewer white background wink