Mirai is mischievous, cheerful, and energetic. She enjoys turning time forward with her powers and appears to consider the elderly and wrinkled people cool. Mirai speaks in a somewhat childlike manner, referring to herself in third person.

According to Akane, Mirai's main trait is being dimwitted. She is also a glutton, likes grooming herself, and is very nimble. Akane likens her intelligence and speed to that of a mouse, which seems to be true since she is able to be caught using a strategy that Nene has also used on her own pet hamster.

However, Mirai does have a serious side as well, which is seen when she is unable to turn Nene's time forward and immediately realizes the implications of this.