Kaito and Miu have only had a few interactions in canon. They occasionally argue with each other during trials due to them both having extremely strong opinions about matters. As a result, they insult each other very often in Class Trials and other interactions.
In Chapter 4, Miu's original plan was to frame Kaito for her murder of Kokichi Oma. However, Kaito is shocked by Miu's death during the killing game, and is one of the few members of the class who doesn't disrespect her in some way after her death. He also told off anyone disrespecting her death during the investigation and such. As such, Kaito still sees Miu as a good person, even after her negative relationship with him when she was still alive.
Personality-wise, neither are very different from each other. They are both very rowdy, and are constantly yelling at people. They are both very extroverted, interacting with their classmates very often. Since they tend to hold very strong opinions, they get into arguments with others often, especially with each other.
Kaito and Miu are mostly shipped together due to their similarly strong personalities, as well as their interests in scientific fields. Both go by a notable title that they refer to themselves regularly, with Miu calling herself the "gorgeous girl genius", and Kaito calling himself the "luminary of the stars". They are both loud and somewhat vulgar, and are often dismissed as not being very smart, despite both being skilled in fields that require a lot of intelligence. They also both have rivalries of some sort with Kokichi Oma. The reason these two are less popular is likely due to the popularity of other ships, such as Harukaito and Saimota, as well as Kiiruma, Irumatsu, and Irouma.
- Akarumota refers to the ship between the two and Kaede Akamatsu
- Iroumota refers to the ship between the two and Kokichi Oma