Slightly stands apart among Neverland's Lost Boys by claiming to remember his life before becoming lost. This belief fosters a conceited personality, though his supposed memories often stem from misunderstandings, like misinterpreting the "Slightly Soiled" label on his pinafore as his surname.

He struggles with imaginative play compared to the others but possesses innate musical talent, crafting whistles and flutes from branches and composing tunes for dancing.

Literary adaptations transform Slightly significantly. He becomes Danyama, an escaped slave child who washes ashore on a Neverland-like island in the 2011 novel *Shelby and the Lost Boy of Misbegot Island*, forming a surrogate sibling bond with Halla. In the *Nevermor* series (2013-2015), he is Sly, who ages, suffers blinding and mutilation, and returns supernaturally after apparent death. The *Everland* series (2016-2018) reimagines him as Scout, a steampunk-inspired character in an underground Neverland.

Visual portrayals vary. The *Peter Pan no Bouken* anime depicts him as overweight, often wearing a rabbit-ear headdress, and collaborating with Curly on practical inventions for the group. In *Peter Pan & the Pirates*, he frequently uses the word "slightly" in speech and aspires to be Peter's second-in-command; his actions, like adding features to the island map, inadvertently reshape Neverland.

His story concludes with him leaving Neverland, growing up, marrying into nobility, and becoming a lord.