Torpedo Girl (魚雷ガール, Gyorai Gāru) is a powerful, unpredictable force not even Bo-bobo and his hajikelists quite understand when she first appears. Compared to her "other half" OVER, she is a living female torpedo with human arms and legs. Furthermore, compared to the patient anger held by the human form, she gets ticked off by even the slightest of comments, immediately responding by making her bomb-like body fly towards her opponent and smashing into them with intense force! Unlike Over, she is actually 28 years old. It is unknown why she is 28 and Over is three years younger.

Part of the reason behind Torpedo Girl's immense anger and frustration stems from her position as a Legendary Idiot Killer (伝説のボケ殺し Densetsu no Bokekoroshi; in the dub, "Joke Killer"), a legendary group of warriors who attacked and killed anyone and everyone that made even the smallest of jokes or performance of foolish action. Whenever she even senses or sees something silly or ridiculous, her immediate action is to attack the fooler with full force. Although she sees herself as vital to the protection of the sanity of the world, Torpedo Girl is considered a nightmare to anyone with hajike abilities such as Bo-bobo, Don Patch or Jelly Jiggler. Considering how acting crazy and silly is part of what makes a hajike attack so successful against conventional enemies, Idiot Killers such as her consistently stop them from being successful in their weirdness. However, as much as she claims to hate hajike attacks, Torpedo Girl has several odd traits that show her own hajike abilities: she is obsessed with the word Torpedo (even to the point of laughing with that word) and is crazy enough to survive in Bo-bobo World, which typically would drive a normal warrior insane (it could be the fact she is one of the Shitennou and has gone past the point of losing to that technique a long time ago.)

Although Torpedo Girl consistently holds an angry grudge to nearly everyone she meets, she does have a more affectionate side to her personality. Although she initially holds hatred for the silliness of Bo-bobo, Don Patch and Jelly Jiggler, she comes to see them merely as "children" who just needs her guidance like a teacher guides their students. In certain battles where she sees them in danger, she fights to protect them from their opponent. Similarly she can assist in awakening the hidden potential of other warriors. During Bo-bobo's battle with his brother Bebebe-be Be-bebe, she is able to awaken a hidden "Ganeme" attack inside the afro warrior. After the first series, she further assists Bo-bobo in evolving his "Hanage Shinken" into its "Shinsetsu" version and continues to watch over the development of the other rebels in their further battle against Hair Hunters.

Another side to Torpedo Girl is her romantic side, bringing out a feminine part of her not normally seen in her. Initially she had been in love with Hatenko, but when he had betrayed her, she placed a "Kill Seal" on him and threw him out into the wilderness. (where, ironically, he would meet the Hajikegumi and Don Patch...and have the same Kill Seal used against him by OVER) Yet when she meets Softon when encountering Bo-bobo's team on their way to Cyber City, she instantly falls heads over heels for him, making her obsessively pursue him and declare her love of him every time he's around. Surprisingly, while Torpedo Girl loves Softon with his strange head, she becomes heartbroken when she sees his true, human face after Icen steals away his Babylon abilities.

Torpedo Girl's main attack ability is simply the usage of her body to fly around and bash into an opponent. Due to the force of acceleration and the weight of her body, she is able to make a powerful attack just by herself. Her body is invincible in this form and can not be penetrated by any attacks, including Fist abilities. Torpedo Girl's more powerful attacks are all classified as the Fist style of Gokuaku Zanketsu Shinken (the same "Fist of Horrible Bloody Murder" as OVER, but made as a separate "Fist of Torpedo" in the dub instead of "Fist of the Ultimately Evil Sword" like her human half), which usually involve the release of many torpedoes that bombard an opponent into an attack they can not escape from. While she often doesn't use them, Torpedo Girl also occasionally uses hajike abilities just like Bo-bobo.

(Source: Bobobo-bo Bo-bobo Wikia)