Giyu Tomioka and Makomo

Black shoulder-length hair with ends sticking out to the sides and short, straight bangs on the forehead.
The eyes are dark blue with rectangular white pupils that become lighter (turquoise) at the base.
Like Sakonji Urokodaki's other students, he wears a white protective mask in the shape of a fox's face, carved by his mentor; it is further decorated with two blue flowers painted on the left side.
Death history:
Makomo was an orphan and became a student of Sakonji Urokodaki, who trained her in swordsmanship and allowed her to pass the Final Selection. During the seven-day trial on Mount Fujikasane, she encountered a powerful, transformed Hand Demon. The demon boasted that it had already killed many of Sakonji's students. Overcome by emotion, Makomo lost control of her breathing and recklessly attacked the enemy. As a result, the demon tore her apart.
Unable to find peace due to Sakonji's failure and grief, Makomo's soul became a fox spirit and returned to Mount Sagiri. She later met Sabito, who had the same problem. They began wandering the forest together, trying to avoid being seen. She can transform into a black fox, but as much as she doesn't want to keep the secret, she really wants to tell Giyu everything.
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Makomo is a former student of Sakonji Urokodaki who was killed by the Hand Demon during the Final Selection.
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Makomo (真菰) was one of Urokodaki's students. She died during the final selection.

Quiet, withdrawn, deeply distressed by your death, blue eyes, black hair. He grew up with his older sister, Tsutako Tomioka. When Giyu was a child, his sister sacrificed herself to protect him from demons. After Tsutako's death, Giyu tried to tell others that she had been killed by a demon, but he was labeled mentally ill and sent to a relative, a doctor.
He became Sakonji Urokodaki's apprentice. At age 13, he met Sabito, and they became good friends due to their similar backgrounds and ages. Together, they passed the final selection on Mount Fujikasane. Giyu was injured after a demon attack and was saved by Sabito, who defeated almost all the demons on the mountain. However, after a week, Giyu learned that Sabito was the only one to die during their selection. As a result, Giyu began to doubt the authenticity of his position after becoming the Water Pillar.
Capabilities
He has mastered a water-based breathing technique. This allows him to effectively counter demonic abilities. Some of the techniques he uses include: "Water Surface Slash," "Water Wheel," "Flowing Dance," and others.
Possesses superhuman physical abilities: strength, speed and reflexes.
Character
He is often depicted as stoic and serious, rarely showing any emotion on his face.
He is a man of few words and usually keeps his emotions under control, rarely showing visible expressions of happiness, anger or sadness.
Takes his responsibilities seriously and firmly believes in the need to follow the rules and protect humanity.
Has a compassionate nature and is willing to put himself in danger to save the lives of others.
Considers himself unworthy of the title of Pillar due to the incident at the selection (Sabito died)
He has wanted to die for a long time but cannot commit suicide because Sabito forbade him to die.