First Appearances Y
  1. Yao (Ancient One). The character first appears in the comic book Amazing Adventures #1 (1961). He is identified as the Ancient One in Strange Tales #110 (1963). His real name is revealed in ???
  2. Natasha "Tasha" Yar. The character first appears in the Star Trek: The Next Generation television series pilot episode "Encounter at Farpoint" (1987).
  3. Yashida Mariko. The character first appears in the comic book X-Men #118 (1979).
  4. Kasidy Yates. The character first appears in the Star Trek: Deep Space Nine television series episode "Family Business" (1995).
  5. Michael "Mike" Yates. The character first appears in the Doctor Who television series episode "Terror of the Autons, Episode One" (1971).
  6. Eren Yeager. The character first appears in the Attack on Titan manga initial chapter "To You, 2000 Years from Now" (2009).
  7. Yellow Devil. The character first appears in the video game Mega Man (1987).
  8. Stanley Yelnats/"Caveman". The character first appears in the novel Holes (1998).
  9. Y'Gythgba/Mona Lisa. A version of Mona Lisa first appears in the Teenage Mutant Ninja Turtles animated series episode "Raphael Meets His Match" (1990). The Y'Gythgba version first appears in a later series of the same name's episode "The Moons of Thalos 3" (2015).
  10. Ymir (frost giant). The character is first attested to, apparently, outside oral tradition, in the Poetic Edda (13th century). He was also potentially identified with the character Tuisto in Tacitus's Germania (1st century CE).
  11. "Li'l" Abner Yokum. The character first appears in the Li'l Abner daily comic strip (1934).
  12. Yondu Udonta. The character first appears in the comic book Marvel Super-Heroes #18 (1969).
  13. Yondu Udonta (criminal). The character, who is derivative of the other Yondu Udonta, first appears in the film Guardians of the Galaxy (2014).
  14. Charlotte York MacDougal Goldenblatt. The character first appears in the Sex and the City television series debut episode "Sex and the City" (1998).
  15. Dale Yorkes. The character first appears in the comic book Runaways #1 (2003).
  16. Gertrude "Gert" Yorkes/Arsenic. The character first appears in the comic book Runaways #1 (2003).
  17. Stacey Walsh Yorkes. The character first appears in the comic book Runaways #1 (2003). Her maiden name is arbitrary.
  18. Yoshi (Yoshi). The character first appears in the video game Super Mario World (1990).
  19. Yoshida Leyu/Sunpyre. The character first appears in the comic book Uncanny X-Men #392 (2001).
  20. Yoshida Shiro/Sunfire. The character first appears in the comic book X-Men #64 (1970).
  21. Zuzha Yu/Puck. The character first appears in the comic book Alpha Flight #1 (2004).
  22. Zhifeng "Tequila" Yuen. The character first appears in the film Hard Boiled (1992). His given name is arbitrary.
  23. Lela Yurani Dax. The character first appears in the short story "First Steps" in the Star Trek: Deep Space Nine anthology The Lives of Dax (1999). Her surname is established in ???.
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