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- "It's not pink, it's light-ish red!"
- —Donut referring to his armor in A Slightly Crueler Cruller
Private Franklin Delano Donut is a main character in Red vs. Blue and is voiced by Dan Godwin. He has a garrulous personality, which tends to annoy other members of the Red Team. He serves as a main character during Red Team's half of The Blood Gulch Chronicles, and is absent during Reconstruction, returned in Recreation only to be absent again during Revelation before returning fully in Season 10 and is considered the main protagonist of Singularity.
When the series first began, Donut was shown to be logical, asking decent questions and was willing to participate in the war. However, when changing Donut's armor color to pink in the latter part of Season 1, the producers also made his sexual orientation a running gag, and fully developed his personality during Season 2. Donut has since been portrayed as a fun-loving, questionable rookie, displaying somewhat novice-level fighting ability while also showing feminine traits.
He also seems to be liked greatly on both Red and Blue teams, as his teammates were sad when they thought he was dead and even Church, at one point, stated he was his favorite Red. According to Wilma Jandoc, who reviewed Red vs. Blue for the Honolulu Star-Bulletin, Donut's personality is developed more thoroughly as season 2 progresses, and he begins to act less sane. Such examples include Donut becoming friends with Caboose, despite being on opposite teams, liking Lopez's love song, and pretending to be a secret agent named "Double-O Donut".
Although smarter, Donut seems to act similar to Caboose, acting childish and gullible. He is commonly shown to display feminine traits and say strange things, which usually makes his teammates feel uncomfortable. However, Donut is shown to be very social, which has earned him to be liked by members of both teams, such as Church and Caboose. Along with this, Donut has shown to be understanding and kind, often caring for his team and helping them.