Kanae Kocho
Even after her death, Kanae is the ex-lover Yukiro cherishes the most. Yukiro could have killed Douma during their first meeting, however, Kanae wanted Yukiro by her side while she died. Kanae wanted Yukiro to promise she would take care of Shinobu.

Shinobu Kocho
Shinobu and Yukiro have always been close, but the death of Kanae and the hunger for revenge only pulls them closer. Yukiro spends more time in the butterfly mansion than in her own home, this makes Shinobu annoyed but she enjoys the company.

Kanao Tsuyuri
Yukiro always seemed to understand what Kanao needed or wanted without Kanao saying a word. Excusing it as her “mom powers”. Any trinket given by Kanao (and the younger members of the corps) is kept dearly by Yukiro.

Muichiro Tokito
She was so quick to take care of Muichiro when he first joined the corps, since he reminds her so much of her kid. Even though Muichiro doesn't remember anything related to Yukiro, he knows she takes care of him. Seeing Muchiro and Tanjiro interact often caused her eyes to water; if her kid was alive, he would be around their age.

Tengen Uzui
Yukiro felt at peace when Tengen made his retirement choice. However, Tengen wanted her to retire with him. That way, both of them could finally live the peaceful life Yukiro desires so much. In the end, Yukiro made a promise that when the Kamaboko squad finished their hashira training, she would retire. That way there would be three people to fill: her spot, Tengen’s, and most importantly, Rengoku’s.

Hinatsuru
Yukiro was the closest to Hina out of the girls, so when Hina asked why Yukiro always denied Tengen’s marriage proposals, she opened up. All her romantic lovers had died, and having more than one person to lose wouldn’t let her sleep at night. Hina said that it also means more people love and protect you.

Makio
Makio always seemed to look up to Yukiro’s skill with the sword. After Yukiro’s retirement, she gifted Makio one of her swords, while Makio gifted Yukiro one of her kunai. Even after retirement, Makio and Yuriko often spar against each other for fun. The retired Hashira always goes easy on her wife.

Suma
Yukiro has never been a big fan of physical contact; somehow, she always eased Suma into her arms whenever she cried. often being the one to "defend" Suma from Makio. Suma is the first to get across Yukiro’s flirty persona and return to the sweet lover she's always been. Suma often finds herself sitting on Yukiro's lap.