Fillin, short for Fillin the Blank, is the pseudonym used by Rottytops in order to sneak in to Paradise Island in order to spend time with Shantae.
One of the Half-Genies that is performing at the Half-Genie Festival, she ends up abducted by an unknown assailant, forcing Shantae to rescue her.
- Her disguise is given away by the following:
- According to the npcs on Paradise Island, all Half-Genies are a hybrid of human fathers and genie mothers. No other hybrid between a genie and another species other than human has been shown in the series so far.
- She gives Shantae and Harmony different answers when asked about her name.
- Rottytops has been known to enjoy cosplay.
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