Guillermo "Willito" Martinez is a Puerto Rican writer, illustrator, character designer, animator, and storyboard artist. He was born in Bayamon, Puerto Rico.

He is a storyboard artist and writer for the Cartoon Network original series We Bare Bears. Guillermo has worked on the episodes "Primal", "Shush Ninjas", "My Clique", and "Brother Up".


While studying in 2d Animation at Academy of Art University, he also took online classes for gesture drawing by a teacher known as Alex Woo, a well-known artist who works at Pixar.

From March 2008 to December 2011, he worked with a comic book company known as Razorblade Apple as a writer and illustrator. He also started work as a 2d animator with Idle Games in May 2010. He helped make the Facebook game Idle Worship. His work on the game was finished in September 2012.

Guillermo proceeded to work as a character designer and animator for multiple social games produced by Breaktime Studios. He worked with them from 2012 to 2013. After his job with Breaktime ended, he went to work with LAIKA where he storyboarded marketing materiel for Wikipedia:The Boxtrolls movie and storyboarded various featured films that have yet to be announced. He worked with them from May 2013 to April 2014. From there, on August of 2014, he went to work with Cartoon Network where he currently works to this day.


  • Guillermo's favorite color is blue.
  • In 2014, Guillermo drank a milk shake in an elevator.[1]
  • Guillermo once drew a piece[2] for a blog known as Cuter in Bunny Ears on April 5, 2013.

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ve Crew
Voice actors Bobby MoynihanCharlyne YiDemetri MartinDuncan JoinerEdi PattersonEric EdelsteinEstelleJason LeeKeith FergusonNiki YangPatton OswaltRodger BumpassSam Lavagnino
Show staff Abe AudishBrad BreeckBrian A. MillerBert YounCharlie ParisiChristina ChangCurtis LelashDaniel ChongDanny DuckerGuillermo MartinezJennifer PelphreyKyler SpearsLauren SassenLilit AtshemyanLouie ZongMadeline SharafianManny HernandezMcKenna HarrisMikey HellerNate FunaroNooree KimRandy MyersRob SorcherSarah SoboleTara HelferTeresa HsiaoTom LawViolet Bruce
Guests Adam CampbellDia FramptonEllie KemperEric FavelaSuzie VlčekPhil RyndaSue MondtVera Brosgol