In contrast to Toro's innocent and pure character, Kuro is mature and somewhat sleazy. His implied upbringing as a stray cat has led to him becoming street smart and wise to the world. Kuro is a man of vices; he loves women, drinking, and gambling, and is often selfish and lazy. He loves to flirt with women, tending to be very direct and inappropriate in doing so.

Note: Many of the names of these characters are unofficial, since they were never given offical names in the game. Toro first appeared as one of the five Pokepi in the original Doko Demo Issyo game, which was released in Japan on the PlayStation in July 22, 1999. He was most prominently featured in the game's marketing, and its success saw him become a mascot for the PlayStation brand. As a result, he receives more focus in later entries of the series, serving as a main protagonist in more story-driven games. Toro's most dominant personality trait is his innocent, child-like demeanor, despite being an adult; he is very curious and wants to learn as much as he can. He's not one to shy away from uncomfortable questions (mature topics in particular are an interest of his) as he sees knowing more about human things will help him become human. One of the struggles of Toro's character is growing up: he is an adult that is old enough to drink but still sees himself as a child who needs to become an adult. He wants to be more mature and knowledgeable of the world, as he is naive and still has a worldview like a child, but his dependent natue makes becoming more mature particularly difficult. His questions involving adult subjects can be seen as his way of learning more about maturity; he believes that becoming a human requires becoming an adult as well.His intimate nature with the player has been a frequently explored topic within most of the Doko Demo Issyo games; one of his biggest motivations for becoming human is so he can marry the player. When it comes to love, gender is not a concern for Toro at all. Despite his dependent nature, Toro loves to help others and make people happy.

Like with Toro, Kuro likes to keep his true feelings and thoughts internal; he wants to give off a "cool guy" persona and doesn't want others to think he cares too much about things or other people, even if he does. Despite his sleazy and selfish nature, Kuro isn't a completely bad person; he cares for the people he is close to, and though hesitant, he can lend a helping paw when his friends need him most. Toro often expresses interest in sexual and "naughty" subjects: he often asks questions about sexual topics, and expresses desire of "becoming sexier", even doing research on "naughty magazines" to learn more about human sexuality. In addition, he seems to make various remarks to his crushes that could be seen to have sexual undertones, although it seems he is unaware of the inappropriate social context it has, or if what he is doing is even sexual. Toro loves to dress up, and can be frequently seen wearing all manners of outfits and cosplays, even traditionally feminine outfits like skirts and dresses: he is often portrayed as gender ambiguous in the original Japanese media. He refers to himself in 3rd-person on occasion as well, giving his speech pattern a childish tone. He already seems to live a life very much like a human: he has owned an apartment and was evicted, hosted a daily and weekly news program, along with many other activities. He still, however, meows and purrs frequently.Toro Inoue (井上トロ), colloquially known as the Sony Cat, is the main character of the Doko Demo Issyo series, and the unofficial mascot of Sony Interactive Entertainment, most prominently in Japan. He is a white bobtailed cat Pokepi, known for having many distinct expressions and a tendency to dress up in various costumes. Toro's wish is to become human, a goal he has seeked in almost every game he has appeared in. He has tried many methods in an attempt to become human, his most diligently chased one is by learning human words; he believes that he can become human in this manner, since he feels he needs to know what to say once he becomes human.