Maryl was a young Human girl who was assimilated by the Borg. Maryl grew up with twelve brothers, nine older, three younger; they often played Kadis-kot together.

In 2375, when the USS Voyager encountered a Borg vinculum, Seven of Nine began assuming personalities of those whom she had assimilated, including Maryl. While taking on the identity of Maryl, Seven played Kadis-kot with Naomi Wildman and behaved like a young child. (VOY: "Infinite Regress")