hello I'm spiralling

Sammy and Will have a little sister named Meredith Lucy Jensen

she was conceived while Sammy and Marlin were on the run

her mom is Jezebel Jensen. Jezebel is the younger sister of Jensen B Jensen, the Elementa villain that works for Herman. that's how she and Marlin met

Meredith is introduced in the Gutter Squad comics after Sammy's death. Jezebel reached out to Will when she heard about Sammy dying