Katie can refer to either of these two:

  • Katie, AB11's sister, who's approximately 10-12 years old. She goes by Aquajelly8 on YouTube, but is generally inactive.
  • DryBones88, a spriter on YouTube that people generally dislike due to her sluttyness and perverted humour, as well as her sometimes trollisque nature. She's either 15 or 16, but tends to lie about her age, so don't believe her until she posts her birth certificate or passport or something.