Kaleya

"What? Kaleya? You finally have the chance to chat with a popular heartthrob like me. Can't you pick a nicer topic? Geez... Never mind. On account of your ability to appreciate my charm, I'll be nice and give you one advice. No matter what, just stay away from that woman! All of you have been fooled by her. She's, in fact, a super cheesy person who only knows to say cringey jokes all the time. Hmph! Clearly, you don't get it. If you were as poor thing as me to be assigned to the same Gardener mentor as her, forced to listen to her nonsensical crap every single day, you'd surely avoid her like the plague too! Moreover, sometimes... I have no clue what that woman is thinking, but she just creeps me out! That's all I'm saying. You gotta heed my words!" —Voice recording of a certain 180cm-tall Prince of Skiing.

Born into a family of physicians, Kaleya had aspired to help the injured since she was a child, a feeling so intense that it became the lone thing she strived for. Her unexpected talents might have stood in the way of her medical research goal after she joined Anita, but she did not give up on this passion of hers; she, who possesses a medical license, would help treat her colleagues in times of need from time to time.
Even though receiving proper help should be a pleasant thing, a few of the people who had the chance to be looked after by Kaleya have some differing views. She is incredibly meticulous when taking care of the injured, but it's practically over the top. The moment she finds out someone's injured, even if it's purely something minor like a scrape or a bruise, Kaleya will order the injured to rest and not work, and her attention would be fully devoted to the patient. In no time, everyone on The Eternal had such an astonishing experience of their own.
Naturally, the person who has been "looked after" the most is still the hard-working Conductor. Many times, Kaleya had to half-convince and half-force the Conductor to take a break. An inexplicably excited smile is always on her face as she passes through the carriages looking for people who "need help." For someone who finds so much joy in taking care of others, will she genuinely not regret giving up on pursuing the study of medicine?

As long as I can help everyone.
As long as this can protect most people's interests, I don't mind sacrificing myself.
All that matters is that the people I want to protect are happy.
These lines belonging to "positive characters" in literary works are also Kaleya's life mottos. The desire to help somebody, protect somebody, and take care of somebody. These actions are what gives her joy, yet for someone who has such a selfless hobby, she once got an extremely dangerous score during a routine psychological assessment in high school.
This result left the teachers open-mouthed, as Kaleya was an excellent student with numerous friends and a happy family, hardly the representation of someone with an unstable state of mind. Their repeated communication with her and her parents also confirmed that she hadn't suffered any kind of stress. Seeing how dumbfounded everybody was, Kaleya had no choice but to reveal, "Sorry. I was a bit absentminded during the assessment, so I didn't really read the questions clearly and just picked an answer at random."
After a redo, Kaleya received a normal score with her answers, much to everyone's relief. From then on, she continued with her education, never once making another mistake when it came to questionnaires handed out by the school, and people eventually forgot about this incident.
However, Kaleya herself was well aware that honesty wasn't required when filling up these questionnaires. Her rational mind knew exactly how to answer these to get a perfect score, and her emotions were cognizant that what she truly wanted to do were fairly radical, such as making a certain someone be eternally reliant on her care, even if it meant she had to do some things that would upset others...
"Will that important person appear in my life someday?" With this expectation in mind, she went on and on to conceal her true thoughts behind those normal scores.