Based on Crossbones from the Undertale AU Team Switched/TS!Underswap, which is Sans’ superhero persona who’s determined to keep the starlight isles safe from crime. Icecaster is her normal name, but Hexflakes is her hero name. Part of the joke Undertale AU Tumoretale, where characters from the battle bricks/raigforce take up the influential characters (mainly the sans/papyrus of their AUs), while an onslaught of the "Friends", pink skinned entities who only follow bloodlust invade all of TBB.