if you don't know the flags

Walter: Aroace (little to no romantic attraction to others, little to no sexual attraction to others)

Isabelle: Pansexual Demiromantic (Sexual Attraction to all genders, romantic attraction to people you already have a bond with)

Lucy: Lesbain (female only attrached to other females, or non-male attrached to only non-males)

David: Bisexual (attracthed to 2 genders), Intersex (born with parts of both sexes)