Mizuki's personality is developed through the dialogue choices made over the course of the game. One can choose to be a jerk, rude and brash even as they help with the plot, or they can choose to be kind and helpful, eager to lead a hand where needed. Mizuki is a kind soul at heart. She is considerate and, above all, a giant chatterbox once she gets going who loves nothing more than talking with people and learning all she can about Alola and its language/s and customs. Her mum came from the region after all, and she's fallen in love with it, even though she's now aware not everything is hunky-dory in Alola.
Yet she's still a child with all the pitfalls that entails. She can be immature and bratty and childish and cruel with her words even if she tries not to be. She can be arrogant and rub in her luck of tripping over shiny pokemon while she's travelled. But she has grown on her Island Challenge; gained humility about her stupid luck with shines and discovered the kind of person she really is and will grow into: Kind, passionate, caring, trusting, willing to help people no matter what, but above all, she believes in doing the right thing by others even if it's hard or she doesn't agree with what 'the right thing' is. In that vein, Mizuki is curious about the world around her and sees the beauty in everything, no matter how small or insignificant. She believes there is good in even the darkest of places or people. Where there is light, there is shadow, and where there is shadow, there is light.
Make no mistake though: Mizuki is a prodigy when it comes to pokemon. She is the Alolan Champion at age 12, she's been paid by Interpol to hunt down and capture the Ultra Beasts in Alola. Given time and growth, it's likely she'll grow into one of the leading figures of her generation. She sticks to her morals as well, and she has the guts to back them up, proof she won't back down from a challenge, even if it seems hard or she's scared. She will be brave because she chose to do this.
Of course, she can be a complete doofus at times, has had to face the consequences of her lack of preparation more than once, has seen through several challenges by the skin of her teeth and skill, all because she didn't stop at a pokemon centre. But, even so, she does heal her pokemon as often as she can, be it via items and berries or a trip to the Pokemon Centre. Her team are her friends first and foremost, and she has swapped several them out purely because they no longer wish to battle.
She both herself and her team to do their best no matter what comes their way on the Island Challenge, and she has met more than a few people who gave up or couldn't hack it, and she doesn't blame them. It's not an easy thing that she's done. But, doing her best does not mean pushing her team beyond what they can do. If she loses, she takes the time to understand why and adjust her thinking. In this way, she's always growing and willing to incorporate new ideas into her existing mindset.
She trusts and is gullible, yes, but the world's not black and white. It's shades of grey, though it's not been an easy pill to swallow as she's been told her face she trusts too much. Yet she'd rather trust than not and believe in the good of the world. Mizuki is kind to a fault, both to friends and people who dislike, even hate her. She wants to believe the best in them, but she won't push her views on anyone.
She understands that she needs to allow people to be people and to have their own thoughts, even if she doesn't like it. Case in point, she felt incredibly uncomfortable with Lillie basically saying that Nebby wants to go with her, but she didn't refuse, because that is what her friend's pokemon wanted. Nor was she comfortable when Guzma gave her his lucky charm, but she accepted it at the time because that was his wish.
Mizuki is loyal and willing put herself at risk for her friends, even those she's just met, going so far as to face down incredibly dangerous odds, be it going into Po town alone, or going up against creatures known as Ultra Beasts, who are basically killing machines.
On a special note, she is well aware of Other Dimensions- she’s canonically travelled to two -Ultra Space to fight the nihilego-possessed Lusamine, and briefly another version of her world.
Personality revised!
Yet she's still a child with all the pitfalls that entails. She can be immature and bratty and childish and cruel with her words even if she tries not to be. She can be arrogant and rub in her luck of tripping over shiny pokemon while she's travelled. But she has grown on her Island Challenge; gained humility about her stupid luck with shines and discovered the kind of person she really is and will grow into: Kind, passionate, caring, trusting, willing to help people no matter what, but above all, she believes in doing the right thing by others even if it's hard or she doesn't agree with what 'the right thing' is. In that vein, Mizuki is curious about the world around her and sees the beauty in everything, no matter how small or insignificant. She believes there is good in even the darkest of places or people. Where there is light, there is shadow, and where there is shadow, there is light.
Make no mistake though: Mizuki is a prodigy when it comes to pokemon. She is the Alolan Champion at age 12, she's been paid by Interpol to hunt down and capture the Ultra Beasts in Alola. Given time and growth, it's likely she'll grow into one of the leading figures of her generation. She sticks to her morals as well, and she has the guts to back them up, proof she won't back down from a challenge, even if it seems hard or she's scared. She will be brave because she chose to do this.
Of course, she can be a complete doofus at times, has had to face the consequences of her lack of preparation more than once, has seen through several challenges by the skin of her teeth and skill, all because she didn't stop at a pokemon centre. But, even so, she does heal her pokemon as often as she can, be it via items and berries or a trip to the Pokemon Centre. Her team are her friends first and foremost, and she has swapped several them out purely because they no longer wish to battle.
She both herself and her team to do their best no matter what comes their way on the Island Challenge, and she has met more than a few people who gave up or couldn't hack it, and she doesn't blame them. It's not an easy thing that she's done. But, doing her best does not mean pushing her team beyond what they can do. If she loses, she takes the time to understand why and adjust her thinking. In this way, she's always growing and willing to incorporate new ideas into her existing mindset.
She trusts and is gullible, yes, but the world's not black and white. It's shades of grey, though it's not been an easy pill to swallow as she's been told her face she trusts too much. Yet she'd rather trust than not and believe in the good of the world. Mizuki is kind to a fault, both to friends and people who dislike, even hate her. She wants to believe the best in them, but she won't push her views on anyone.
She understands that she needs to allow people to be people and to have their own thoughts, even if she doesn't like it. Case in point, she felt incredibly uncomfortable with Lillie basically saying that Nebby wants to go with her, but she didn't refuse, because that is what her friend's pokemon wanted. Nor was she comfortable when Guzma gave her his lucky charm, but she accepted it at the time because that was his wish.
Mizuki is loyal and willing put herself at risk for her friends, even those she's just met, going so far as to face down incredibly dangerous odds, be it going into Po town alone, or going up against creatures known as Ultra Beasts, who are basically killing machines.
On a special note, she is well aware of Other Dimensions- she’s canonically travelled to two -Ultra Space to fight the nihilego-possessed Lusamine, and briefly another version of her world.