Mitsuri Kanroji (甘露寺蜜璃 Kanroji Mitsuri) is part of the Demon Slayer Corps and is the Love Pillar. She uses the Breath of Love (恋の呼吸 Koi no Kokyu) which is derived from the Breath of Flames (炎の呼吸 Hono no Kokyu) and her instructor was Shinjuro Rengoku the former Flame Pillar. Mitsuri is a voluptuous young woman with a kind face. She has pale green eyes with small moles under each eye. Her most defining feature would be her long hair usually tied in three braids which is pink and fades into neon green halfway through. It is said that her hair turned this color due to her eating too many sakuramochi. She wears a modified version of the Demon Slayer outfit in which her chest area is left unbuttoned and instead of the hakama she wears a short pleated skirt and over the top of her uniform she wears a white haori. Also, a very similar color to her neon green hair she wears striped thigh high socks which were a gift from Obanai Iguro.

Mitsuri was born with a unique body-type with a very special composition. To maintain the composition of her body Mitsuri needs to eat as much as three sumo wrestlers. Added with the fact that she has a very unusual hair color, she was concerned that no one would want to marry her. She dyed her hair black and forced herself to act weak and not eat as much, to make her seem like a ‘normal’ girl which instead caused her stress since she was hiding her true self. At some point she stopped hiding herself and joined the Demon Slayer Corps since she wanted a husband who could be strong enough to protect her. Even though she stopped hiding, she was still self conscious and was saved when she met Kagaya Ubuyashiki the 97th leader of the Demon Slayer Corps who told her that she was fine the way she was and that the people who insulted her were just jealous of her talent. Embracing her own strength, she rose to the position of a Pillar with a motive to have more chances to meet stronger people and one day find her future husband.

Mitsuri is a very kind and emotional person who has trouble hiding her expression which can be seen when she bursts out laughing while the other Pillar members hold it in. She is shy but always kind to others, even to Nezuko who had turned into a Demon. She loves her family and her five siblings and is shocked to hear that Sanemi Shinazugawa and his brother Genya Shinazugawa do not get along.

Obanai Iguro (伊黒小芭内 Iguro Obanai) is a short young man who is part of the Demon Slayer Corps in the Kimetsu no Yaiba (Demon Slayer) series. He uses the Breath of the Serpent (蛇の呼吸 Hebi no Kokyu) and is the Snake Pillar. Obanai has straight black hair of varying lengths, the shortest stopping at his cheeks and the longest reaching his shoulders. He has sharp pointed eyes with unusual eye colors due to him having heterochromia. His right eye is yellow and his left eye is turquoise. Obanai's lower half of his face is covered in bandages to hide his mouth which was cut from the corners of his lips to his ears to appear snake-like. He wears the standard black Demon Slayer uniform and a black and white striped haori which covers his hands. Obanai is always with his white snake Kaburamaru which is wrapped around his shoulders.

Obanai was born and raised in a cell by a family who worshipped a female snake-like Demon. The Demon's face and lower half of the body took the form of a snake and loved eating babies. His family sacrificed their own children in exchange for the stolen goods of the people the Demon had killed. As Obanai was the only boy born into the family for 370 years with eccentric eyes the Demon was especially interested in him and let him live until he had grown bigger before she decided to eat him. When he was 12 years old, Obanai was taken outside to be presented to the Demon and was forced to have his mouth cut by his family to look similar to the snake Demon. After being returned to his cell he lived in constant fear and worry while he planned his escape, the only one he could trust was a white snake, Kaburamaru, who he considered his close friend and not a pet. When he finally escaped he was chased by the snake demon and was almost killed but luckily he was saved by the Flame Pillar of the time. When he escaped the Demon killed his entire family leaving only one cousin alive who berated and blamed Obanai for the death of their family. With no proper outlet to direct his emotions, he decided to turn his rage and hate onto the Demons, feeling as though he was a better person whenever he risked his life for someone else's sake.

Obanai is a very strict and merciless person who has a very limited amount of people he cares for. During Pillar training he ties up the lower ranked Demon slayers for petty reasons such as annoying him and uses them as obstacles. He respects Kagaya Ubuyashiki, the 97th leader of the Demon Slayer Corps by bowing down to him when he appeared for a meeting. He also respects Gyomei Himejimastating he couldn't even be Himejima's shield. He cares greatly for and has a crush on Mitsuri Kanroji, even gifting her green striped socks to wear as a present but because he possess an immense sense of self loathing he doesn’t confess his feelings. This self loathing comes from the fact that he was born into a selfish clan who would mercilessly sacrifice their own children to a Demon for riches. Obanai thinks of himself and his family to be so tainted that, only by defeating Muzan and dying would it hope to cleanse his corrupted blood. Only by first dying then reincarnating into a world without Demons would he be worthy of confessing his feelings to Mitsuri Kanroji.

After defeating the demon king, muzan kibutsuji, they had both barley survived, Mitsuri getting deep lashes on her arms, almost being completely torn off in the fight, and obanai having a big scratch scar across his face to match his slit mouth. They both had survived, and now that demons were gone, obanai worked up the courage to confess to Mitsuri, and they have been together for a year now.