Due to Natsumi being moved around a lot, and given up by many people, she has a very low self esteem and she is riddled by self doubt. Although she may act like everything is alright, she is at start at the verge of falling apart. The only people who can tell when she's getting bad again is her boyfriend Shoto Todoroki, or her adoptive brother Katsuki Bakugo.

She doesn't always take criticism very well, and she will sometimes later breakdown about it to Shoto. Although, she does her best not to bother him too much not wanting to be a bother.

After a few years, although she has her depressive episodes, she is overall a happy, confident person who knows what to do now to keep herself from being negative all the time.

She believes in people, and she believes that they can accomplish their dreams, and she believes that people can be good. She believes in strangers that she walks by.

She believes in everybody but herself.

She is extremely loyal to her friends and family, and will do just about anything for them.