Sonic Boom Tv logo
This character exists primarily within the Sonic Boom continuity.
Information in this article may not be canonical to the storyline of the games or any other Sonic continuity.

Mark the Tapir is a character that appears in the Sonic Boom television series. He is an anthropomorphic tapir who resides on Seaside Island, and the fanatical, self-proclaimed “number-one fan" of Sonic the Hedgehog.[1]


Mark is an anthropomorphic, brown-furred tapir with peach skin at about Sonic's height. He has a wide head with large, light brown eyes, round ears, a short, prehensile snout, and bangs of brown hair on top of it. Noticeably, he has a small mole on the left side of his nose. He also has a round (if not chubby) torso, disproportionately long arms and short, stubby legs. For attire, he wears brown glasses with white bandages on the sides, a blue shirt with white rims, a white collar and a blue and white icon of Sonic's head on the left side, white gloves, and long red shoes with grey soles and white cuffs.


TV series

Season two


Mark having trapped Sonic in a body cast.

Living alone in a run-down cabin in the woods, Mark came to Career Day to meet Sonic, where he introduced himself to Sonic before he left. He then began to follow Sonic, trying intensely to please him. Eventually, Mark got Sonic to let him become his assistant. While giving Sonic excellent services, Mark crashed Sonic into a boulder when he had to go to the movies with his crew. He then trapped Sonic in a body cast in his cabin so they could spent all their time together acting out Mark's fanatic dreams. Though Mark trapped Sonic's team in body casts too when they came looking for him, the heroes broke free while trying to escape and beat Mark, who was only happy to be beaten by his hero.[2]



Mark dressing up as Sonic for one of his fanfictions.

Mark is a fanatical, disturbing and mentally unstable psychopath obsessed with Sonic. Outwardly, he appears as an overly eager and friendly guy who tries his best to do good deeds, albeit with extreme intensity. He is also a supreme fanboy, geeking out over doing the most mundane things with Sonic and seeking to spent as much time with him as possible. When he thinks he has failed to live up to his idol's expectations or chances to satisfy his fanboy dreams, he is prone to bouts of mood swings and/or minor self-punishment. Mark is also not one to sit still (especially when Sonic is around), as he always has something going on, and is very observant about details. Outside Sonic and those he deems his friends, Mark behaves rather antisocially towards others.[2]

Beneath his nice-guy facade, Mark is cunning and devious, as exemplified in how he lured Sonic into a false sense of security despite his intensity and getting Sonic to make him his assistant for his own agenda. He also shows pronounced sinister tendencies, not only hurting his idol Sonic to keep him to himself, but also keeping people against their will so they can be his friends. In spite of his inexcusable behavior however, Mark always acts innocence, showing a complete lack of conscience and empathy.[2]


Sonic the Hedgehog

Blue arms joke

Mark having painted a portrait of Sonic in his honor.

The self-proclaimed, “number-one fan" of Sonic the Hedgehog,[1] Mark has an unhealthily obsession with his idol.[2] Noticeably, he has decorated his home with images of Sonic and written a number of mature and inaccurate fanfics about him. Mark also thinks he is much more important than regular people. Unlike Sonic's other fans, Mark does not criticize everything he does.[2]

When first hanging out with Sonic, Mark was constantly geeking out over doing the most mundane things with him and tried to show they had a lot in common by mimicing Sonic's choices. Similarly, Mark was quick to blame himself whenever he thought he had failed Sonic. Upon becoming Sonic's assistant so he could focus on his heroics, Mark build a friendship with him by making works in his honor and pampering him. Regardless, Mark was willing to injure Sonic and keep him trapped in his cabin, all because he wanted to spent all his time with him. Even then, he would relegate Sonic to side-roles when acting out his fanfictions about him and punish Sonic for misbehaving. When Sonic turned against him and foiled his plans though, Mark was only ecstatic about being defeated by him.[2]

Tails, Amy and Knuckles

Because Sonic took more interest in hanging out with his gang than him, Mark did not take kindly to Tails, Knuckles and Amy at first. As such, he would try mooching in on the group when Sonic was with them or keep Sonic away from them entirely. After Mark caught the trio trying to free Sonic though, Mark decided to imprison them and make them his new friends, only for them to escape shortly after.[2]


  • Mark's role in "The Biggest Fan" mirrors that of Annie Wilkes in Steven King's novel, Misery.
  • Mark does not really care about "SonAmy" (a fanterm for Sonic and Amy being in a romantic relationship).[2]
  • The icon of Sonic on Mark's shirt first appeared in Sonic Boom CG Style Guide.
  • Mark's attire mimics Sonic's appearance; his shirt is blue like Sonic's torso, his gloves are almost the same as Sonic's, and his shoes' parts have roughly the same colors as those Sonic wears.
  • Contrary to popular belief, Mark is not based on any character in particular.[3]


  1. 1.0 1.1 Bill Freiberger on Twitter. Twitter (5 December 2016). Retrieved on 5 December 2015. “Bill Freiberger: 205: Sonic lets Mark the Tapir, a fanatical, self-proclaimed “number-one fan,” become his personal assistant. Mark eventually goes too far.”
  2. 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 Lieblich, Doug (10 December 2016). "The Biggest Fan". Sonic Boom. Season 2. Episode 57. Boomerang.
  3. Doug Lieblich on Twitter. Twitter (11 December 2016). Retrieved on 12 December 2016. “Mathan Sivanesan: ...Mark the Tapir based off an infamous person from the Sonic community or is he just the overly obsessive fan character? / Doug Lieblich: He's not based on anyone specific. Just an obsessive fan character.”
Community content is available under CC-BY-SA unless otherwise noted.