Nepeta Leijon, also known da her Trollian handle, arsenicCatnip, is one of the Trolls. Her associated zodiac sign is Leo (♌) and she has horns shaped like cat ears.

Her typing quirk consists of preceding every line with ":33 <". ":3" is generally used as a smiley reminiscent of a cat face, while 33 is the atomic number of arsenic. ":33" also represents the face of her two-mouthed feline Lusus. She occasionally changes these to form different facial expressions. She replaces syllables of words with feline-related homophones, such as "purrmission," "refurring" o "pawses" rather than "permission,"...