Aries - Flowey
Taurus - Sans
Gemini - Donald Tru - I mean, Undyne..
Cancer - Toby Fox (the dog)
Leo - Papyrus
Virgo - Monster Kid
Libra - Snowman (idk he just really likes u)
Scorpio - Chara
Sagittarius - Mettaton
Capricorn - Toriel
Aquarius - Napstablook
Pisces - Alphys