The Midnight Frogs Wiki
Viper as seen in Episode 4
Character info
Title Space Pirate
Gender Male
Race Viper
Faction None
Voice Actor BigTUnit1
First Appearance Episode 4
Status Minor character

Viper is an antagonist-turned-minor character in Sgt Frog Abridged. He is an infamous space pirate with an apparent history with the Keroro Platoon. The flashback in Episode 7 reveals that he is Dororo's father, and he begins reappearing occasionally from thereon-out. Though their relationship was not explored until Ask GiroDoro, Dororo believes that Viper's criminal life and general absence is the root of many of his numerous friendship and mental issues.

Viper returns in Episode 18 with an apparent interest in reconnecting with Dororo, as well as Keroro, who was revealed shortly before to be Dororo's missing little brother. Episode 19 further drives home his promiscuity and his ever-widening/spiraling family tree. By the end of Season 3, he is the lynchpin of the entire series and the problems of the main characters, even carrying over into The Sgt Frog Abridged Movie.

Notable Quotes

Koyuki: "You'll never get away with this!"
Viper: "Loser says what-what? Ha! Viper 2, you 0." - Episode 4

Dororo: "Wait. What do you mean 'which one'...? Oh shit!"
Viper: "Here's your child-support! WOOB-WOOB-WOOB-WOOB-WOOB!" - Episode 10

Grandma Viper: "Viper!"
Viper: "Son!"
Keroro: "'Son?!' What the hell is wrong with your family?!"
Viper: "It's a big family reunion! Bastard sons... Mom-son... Dad-train..."
Keroro: "You know what? I don't want to be in your family anymore!" - Episode 19


  • Ezekieru, editor for Geass TAS, was originally asked to voice Viper, but it didn't work out and he suggested his friend BigTUnit instead. BigTUnit1 became part of the lead trio behind TheMidnightFrogs, a writer for the series, recurring voice actor, and a regular on TheMidnightFrogs Podcast until he stepped down in 2017 to focus on work.

Viper Relatives

Grandpa Viper

Viper's father appears in the Episode 7 flashback. He was a kindly old man who helped the young Zeroro, Keroro and Giroro find Viper's hidden treasure. He however seemed to have memory problems: not only couldn't he remember his own grandson, he had been on that same train since before his mustache turned from brown to gray.

He returned in SFA19 for a voice-only cameo, having apparently been on the train so long that he fused with it. He returned in SFA24, this time fused to Shurara's refrigerator by Robobo, revealing that it was because of Robobo that he was previously fused to the train. It is unknown if he ever escaped after Shurara was defeated. He was voiced by ThornBrain.

Grandma Viper

Viper's "mom-son" appeared in Episode 19 on the same train as Dororo's Mom for no explicable reason. She is Dororo's grandmother, but she is also apparently Viper's son. Her only purpose in the episode was to emphasize how screwed up Viper's family tree is. She was voiced by Travis in a slightly higher Viper voice.