Minori has a high degree of self-discipline and is constantly hard working and training.
Her goal is to achieve perfection in all things, and she's usually taking things very seriously.
She's humble and gentle as well as honest and straightforward and she acts honorable and respectful towards others.
Minori has a sweet and cute personality, but apparently there is still more to her which she hides deep inside.
Minori was the leader of The Phantoms in the past as was revealed in chapter 4 page 150