Even though he's the smallest roach in the group, most of the time he's the most intelligent, always being the brain in the plans, but is sometimes forced to go solo, because his brothers often think that his plans are stupid.
Joey (born 15 June 1991) is a purple-pink body, purple-blue head roach with a pink right eye (originally red) and yellow left eye, and the oldest brother.It is also implied that the roaches are named after members of the rock band, The Ramones. The cockroaches love pranking them so much, that if the cats were to leave, they would miss them (as seen in the episode "Moving Out"). The Cockroaches are three brothers who antagonize other characters, mainly Oggy and Jack.Notable other accomplishments include winning the Formula 1, placing first in a marathon, and ultimately winning over his girlfriend Olivia. However, in more recent episodes, Oggy has been portrayed as heroic, often triumphing over the cockroaches despite the beatings he takes from them and Bob. In early episodes, Oggy, like his "predecessor" Tom in Tom and Jerry, was the main punching bag in the series. According to executive producer Marc du Pontavice and France Info, the character of Oggy was named after punk rock musician Iggy Pop and the rock album The Rise and Fall of Ziggy Stardust and the Spiders from Mars. Oggy's house appears bigger on the inside, mainly featured in the roller coaster-like staircase scenes. Whenever he finds himself alone in his house, he will eventually begin to miss the cockroaches along with their pranks (as seen in the episode "Priceless Roaches","So Lonely" and "Alone At Last") followed by nothing interesting happening in his life. Despite the constant mayhem caused by the cockroaches, Oggy has developed a sort of love–hate relationship with them, having lived with them for a long time.
Oggy usually spends his time either watching TV or doing housework - when not chasing the cockroaches.
Often, she will kiss Oggy on the lips like in The Cube, while in some other episodes, she usually kisses him on the cheeks. She usually hangs out with him as they tend to be really good friend but she secretly has a feelings for him. She isn't extremely nervous about being with Oggy unlike him. Oggy is Olivia's crush, and later her husband as of the Season 4, Oggy Is Getting Married! (their life after marriage is not shown in any season or episode). Olivia owns a mustard-yellow Mini Cooper that is mostly used in Washing Day and Farmer for a Day. She also has pink dots from which her whiskers sprout. Her nose is pink and is much smaller than Oggy's. She has a pink belly with a spiral-shaped belly button, like Oggy. She mainly wears a yellow bow on her head. She is a white cat who has black hair and blue eyes. She has a very similar appearance to Oggy, albeit with a few changes such as being skinnier than him. She sometimes acts fussy when something happens to her face, she would scream loud and then hide in her room, like in Olivia's Pimple, implying that she cares a lot about her looks. If someone making them a jealousy at them, she'll start crying as shown in A Jealous Guy when Oggy seeing a Joey picture appears again and becoming black eyes back and go forth to the ravine seen in his eyes with his car. She likes insects and doesn't want anyone to hurt them. Olivia is a kind, lovely and nature-loving cat.