Molly

'Information found online is most likely outdated. All information is to be changed following theory debunk streams, upcoming Patreon comics, and the pilot.'

Molly is a character in '''Hazbin Hotel. '''

Current Speculations
Molly will not appear in Hazbin Hotel' s pilot, but is canonically Angel Dust's sister. She is planned to appear later in the series, along with Angel Dust's other family members such as Angel's older brother Arackniss, his father Henroin, and his unknown mother.

She may appear later in the series, or at the very least be referenced, according to the Sept. 1 Q&A stream.

Angel Dust
Angel is Molly's twin brother. It's unknown what their relationship is outside of being blood related.

When asked on what their relationship is, Vivziepop said that they're siblings and their relationship is positive and that she can't say much about their relationship.

Arackniss
Arackniss is Molly's older brother. It's unknown what their relationship is outside of being blood related.

Henroin
Henroin is Molly's father. It's unknown what their relationship is outside of being blood related.

Molly's Mother
Molly has a mom. It's unknown what their relationship is outside of being blood related.

Trivia

 * Vivziepop said in her VIVZIE STREEM- Test Test -#1 live stream that Angel and Molly are fraternal twins and not identical twins.