(If a character isn't here then I don't have any specific headcanons for them)

Okay, here's my current full list:

MePhone4: Pansexual trans man (he/him)

MePad: Agender (he/him)

Toilet: Unlabeled (he/him)

Apple: Lesbian trans girl (she/her)

Balloon: Aroace, bigender (he/she)

Baseball: Bisexual (he/him)

Bow: Lesbian trans girl (she/love/chair)

Knife: Pansexual trans man (he/him)

Lightbulb: Omnisexual trans girl (she/her)

Marshmallow: Lesbian demigirl (she/they)

Nickel: Quoiromantic gay (he/him)

OJ: Gay (he/him)

Paintbrush: Non-binary bisexual (they/them)

Paper: Gay (he/him)

Pepper: Lesbian (she/her)

Pickle: Bisexual (he/him)

Salt: Bisexual (she/her)

Taco: Lesbian (she/her)

Cheesy: Non-binary, unlabeled sexuality (he/they)

Fan: Genderfluid pansexual (he/she/they)

Microphone: Bisexual (she/her)

Soap: Sapphic (she/her)

Suitcase: Non-binary (they/she)

Test Tube: Bisexual (she/her)

Tissues: Non-binary omnisexual (he/they)

Trophy: Gay trans man (he/him)

Yin: Bisexual trans man (he/him)

Yang: Bisexual (he/him)

Bot: Questioning (they/them)

Cabby: Lesbian (she/her)

Candle: Lunettian lesbian (she/they)

Clover: Lesbian (she/her)

Goo: Gay (he/him)

Silver Spoon: Non-binary lesbian (he/him)