- The Hero: The main hero of the series.
- Large Ham: As much as any self-respecting shonen hero should be, and then some.
- No Celebrities Were Harmed: Gets his name from Ken Starr.
- Pointless Bandaid: Has one on his nose.
- Stock Footage: Most of the time he's portrayed using the exact same frame of animation, and always with the same expression on his face.
- Attack! Attack! Attack!: His usual strategy is to attack head-on. It never works.
- Berserk Button: Calling "hot dogs" hamburgers. Galacticamaru learned this the hard way.
- Butt-Monkey: The only person he ever beats is Galacticamaru.
- Heel–Face Revolving Door: He switches sides twice in three episodes.
- Hot-Blooded: He has a pretty fiery temper.
- The Lancer: Of the heroes.
- The Mole: A pretty obvious one for Galacticamaru. It doesn't last, though.
- Not So Harmless: Yusuke getting defeated effortlessly becomes a running gag, but then again he is the one who knocks out Galacticamaru with a single punch.
- Shonen Hair: His hairstyle.
- The Rival: To Kenstar.
- The Worf Effect: At one point, he loses to stairs.
- Hong Kong Dub: Easily the biggest offender. His lip flaps don't even try to sync with his voice.
- Person of Mass Destruction: Capable of destroying a WHOOOLE kitchen.
- Not So Stoic: Getting called out on his constant shooting of people in Episode 3 finally has him Freak Out!.
- Trigger Happy: Come episode 3, when he can't stop shooting things.Kotobaru-san-sama: "Dude. Just because you have a gun-"
Kotomaru: "I DON'T CARE! OKAY!? I'M OUT OF BULLETS ANYWAY!"
- Verbal Tic: "Huh."
- Amazing Technicolor Population: He's blue.
- Non-Action Guy: Despite how played up he is in the first episode, he's the only person in the party (aside from Girl-chan) to not do anything at all the whole series.
- The Chick: The only girl in the group.
- Flat Character: Even compared to the rest of the cast. All we know is that she loves Yusuke, doesn't like Swirly Glasses, and has huge boobs.
- Gag Boobs: Her main trait.
- Gainaxing: Up to 11.
- Ms. Fanservice: Parodied.
- Supporting Protagonist: Despite her name being right in the title, she doesn't do anything and only makes a handful of appearances.
- Evil All Along: In the last episode he is revealed to be one of the main villains.
- Expy: Seems to be one of Mandark. For an anime example, he's also similar to Umino/Melvin from Sailor Moon.
- The Mole: For Galacticamaru.
- Nerd: Looks like an stereotypical one.
- Opaque Nerd Glasses: He wears this kind of glasses, emphasizing his nerdish looks. They even give him his nickname.