Motsu is the comic among the two, providing some occasional comic relief by doing comedic action, making random remarks, and taking occasional disguises for hilarity. Whenever he is not in disguise, he is typically seen wearing either a necktie, a mustache, or a tuft of hair. In the later episodes, a bizarre sub-plot involves him and Makie, where Makie refers to him as "Daddy". Makie eventually explained that she never actually thought Motsu was her father; rather, she was simply comparing him to a pet dog her family used to own, who was named "Daddy" and who resembled Motsu. Motsu's favorite line is "...in a good way" (いい意味で ii imide), which he often says in ironic circumstances, such as while crying on the tea he prepared for Takamichi and Evangeline after being "rejected" by Makie. Motsu appears to be based on Aboshi Frog, a character created by Mako Aboshi for the Pani Poni Dash! anime, which is also a Shaft production.
Shichimi, on the other hand, provides voices of reason. She has no visible limbs, which only appear when holding or scratching something. She is also able to elongate her entire body like a snake. Having an inherent cuteness, she later begins to hang around with Nodoka often, with some of the moments ranging from Shichimi taking a nap on Nodoka's lap to the cat sitting on Nodoka's head while Nodoka is in her Armor form. True to her mostly feline form, she ends her sentences with "mya" (ミャ), as if mimicking a cat's meow.
Motsu is voiced by Chiwa Saito, and Shichimi is voiced by Miyuki Sawashiro. In the English dub, Motsu and Shichimi are played by Trina Nishimura and Brina Palencia respectively.