Recovery Girl

Chiyo Shuzenji (修しゅう善ぜん寺じ治ち与よ Shūzenji Chiyo?),[1] also known as Youthful Heroine: Recovery Girl (妙齢ヒロイン リカバリーガール Myōrei Hiroin Rikabarī Gāru?),[3] is a nurse at U.A. High School. She has two offices; one located in U.A. and one in the Sports Festival Stadium.
Real Name:Shūzenji Chiyo
Alias: Youthful Heroine: Recovery Girl (妙齢ヒロイン リカバリーガール Myōrei Hiroin Rikabarī Gāru)
Birthday: April 4th
Age: 60+
Gender: Female
Height: 115cm (3'9")
Hair Color: Gray
Blood Type: B
Quirk: Heal
Status: Alive
Birthplace:Tokyo
Occupation: Nurse/Pro Hero
Affiliation: U.A. High School
Fighting Style: Support

Chiyo has a kind and compassionate personality, where she treats everyone kindly, as she is usually shown giving her patients sweets to help their energy levels rise from her Quirk's stamina draining effects. Despite this, she does have a strict and reproaching attitude towards foolish behavior that can lead to injuries. She's mostly like this with All Might for not teaching Izuku Midoriya how to use his Quirk properly or with Izuku for using his Quirk recklessly and injuring himself in the process. She eventually refuses to heal Izuku's injuries caused by One For All to prevent this habit from becoming an ongoing cycle, and encourages Izuku to find another way to master his Quirk's power without leading to self-injury.
She can also be quite harsh and critical, as she rebuked Present Mic for being defeated by a swarm of bugs during his practical battle in the First Term Final Exam, despite his entomophobia.

Heal (癒いやし Iyashi?): Chiyo's Quirk allows her to amplify and speed up the human body's natural healing process by planting a kiss on the injured person. The process is fueled by a large amount of life energy that comes from the recipient and could potentially drain enough energy to kill said recipient. She also seems to be able to stretch her lips to an abnormal length.
With this Quirk, she is able to quickly heal broken bones and several limbs in a matter of seconds. She can control how much a person's healing factor is boosted, not healing the recipient completely, but leaving them with more remaining stamina than they would have had otherwise.
Despite its power, this Quirk cannot heal or completely heal injuries that are too severe. In addition, Heal cannot regrow lost body parts.

Medical Expertise: After the battle between Izuku and Shoto Todoroki, Izuku's hand was too damaged to be healed by Recovery Girl's Quirk alone, so she had to perform surgery. This suggests that she is actually a professional doctor with proper knowledge of medical science.

Chiyo's surname contains the characters for "discipline" (修 shū?), "virtuous" (善 zen?), and "Buddhist temple" (寺 ji?), and her first name contains "heal" (治 chi?) and "bestow" (与 yo?).
The first part of Chiyo's family name seems to come from the word for "repair, mend" (修しゅう繕ぜん shūzen?).
It may also be a homage to Shuzenji, a town in Shizuoka known for its hot springs, as it shares the same spelling.
According to Chiyo's Volume 8 profile:
Chiyo's favorite thing is candy.
Chiyo has worked at U.A. for over forty years, and her words hold just as much authority as that of Principal Nezu's. Kohei Horikoshi also describes Chiyo as the supporting mainstay of the school.
According to Chiyo's Ultra Analysis profile:
She is U.A. High School's longest tenured employee.
She frequently travels to hospitals around the country in order to offer her healing services.
Her personality describes her as "brisk and lucid".
Chiyo's second English voice actress, Luci Christian, also voices Ochaco Uraraka.
Chiyo shares her birthday with Tomura Shigaraki, Naomasa Tsukauchi, and Kesagiri Man.
Her Quirk seems to be a literal version of when a parent kisses a child's injury to "make it better".