Usagi is known to enjoy teasing Chiikawa amongst other individuals. Sometimes, their provocations are not necessarily intentional or playful, as seen when they ignore Momonga's demands to leave their Magical Rice Cooker alone, angering the latter. Usagi is also shown to be the most decisive and occasionally the most fearless and competent of the main trio. When rescuing the three members of Pajama Party, Usagi is the first one to notice their predicament, and to run to save them. When Chiikawa is being abducted by a large monster, Usagi is also immediately alert and ready when awoken by Hachiware. In subsequent combat with the monster, Usagi displays a talent for throwing objects with accuracy at a target, and their expression remains unchanging even in the face of danger, implying that they are either the calmest in the face of crisis, or simply unable to feel fear.
Usagi does not speak using standard words or complete sentences. They speak high-pitched, chaotic, and energetic. Usagi frequently yells catchphrases like "Yaha!" (or "Iya-ha"), "Ura!", "Haa!", and "Iyaa!" to show excitement, surprise, agreement, or general mischief.
