Chachamaru

Chachamaru
Kanji	茶々丸
Rōmaji	Chachamaru
Characteristics
Race	Demon Feline (Formerly)
Gender	Unknown Male (Kimetsu Academy)
Hair Color	Calico
Eye Color	Amber
Affiliation
Affiliation	Tamayo and Yushiro
Occupation	Familiar
Personal Status
Status	Active
Debuts
Manga Debut	Chapter 25
Anime Debut	Episode 13

Chachamaru (茶 (ちゃ) 々 (ちゃ) 丸 (まる) , Chachamaru^?) is a feline familiar that assists in Tamayo's medical research with demon blood.

Quick Answers

How does Chachamaru assist in Tamayo's medical research?

Chachamaru aids Tamayo by being the primary transporter of blood samples collected by Tanjiro from demons he battles.

Provided by: Community

Who created the syringe that Chachamaru collects to give to Tamayo?

The syringe-like knife used by Tanjiro and taken by Chachamaru was made by Yushiro.

Provided by: Community

What role does Chachamaru play in Demon Slayer?

In Demon Slayer, Chachamaru is a demon cat associated with Tamayo and Yushiro. Initially, Chachamaru is known for being Tanjiro's primary transporter for demon blood samples for Tamayo. Later on, Chachamaru is involved in the final battle against Muzan by supplying antidotes for the Hashira affected by Muzan's poisonous attacks.

Provided by: Community

Appearance

Chachamaru is a small, tricolor calico cat with a white base accompanied by black and brown spots. It has big amber eyes. On its back, it wears a brown box with a syringe created by Tamayo with the purpose of collecting demons' blood. Around its neck, it wears a necklace with a paper talisman that was made and given by Yushiro, which it uses to hide with Yushiro's Blood Demon Art.

History

No information is given on the cat, it is simply introduced as Tamayo's feline familiar used as a transport mechanism for her medical studies. It can be presumed that it has been helping Tamayo and Yushiro for quite some time, as it is well-trained. Like many cats, Chachamaru likes pets, and will briefly stop for them before returning to its work.

In preparation for the final battle, Tamayo managed to transform Chachamaru into a demon, an act that weighed heavily on her heart. Despite Chachamaru having no agency or decision in the matter, Tamayo's primary concern was ensuring that Yushiro would not be left in solitude and consumed by loneliness. Interestingly, Chachamaru's own sentiments revealed a content acceptance of the transformation, driven by its unwavering love for Tamayo. No specific details are given regarding the process of its transformation.

Synopsis

Tsuzumi Mansion Arc

Chachamaru first appears after Tanjiro's battle with former Lower Moon Six Kyogai. Initially it arrives invisibly until it meows and is revealed to Tanjiro. Once the blood is tucked into the box on its back, Chachamaru hops away and becomes invisible once again to avoid detection.

Entertainment District Arc

After Tanjiro's battle with Upper Moon Six Gyutaro and Daki, Chachamaru appears swiftly to collect the blood from Tanjiro. It is given a small pat by Tanjiro before it hops away and returns to Tamayo.

Swordsmith Village Arc

Although Chachamaru doesn't collect any blood after the battle against Upper Moon Four Hantengu and Upper Moon Five Gyokko, it is seen delivering a note written by Tamayo, seemingly to inform Tanjiro that there is a possibility that Nezuko Kamado is capable of overcoming the sunlight.

Sunrise Countdown Arc

Chachamaru is seen during the battle with Muzan, after the Infinity Castle collapses. It was stuck in the rubble from the chaos and was saved by a Kakushi. The cat then runs towards the battle and jumps above the remaining Hashira in order to administer an antidote to stave off the poisonous effects of Muzan's attacks. As a result, it is sliced in pieces by the demon and lay struggling on the ground for a while. Some time later, Yushiro found the cat and reassembled it. The Demon Slayers accompanying Yushiro, Murata and Takeuchi, reacted in surprise when they saw it and Yushiro explains that they turned it into a demon right before the battle.

Abilities

Demon Abilities

Regeneration: After it became a demon, Chachamaru possessed the ability to withstand being cut apart as seen when Yushiro was able to put it back together after it was dismembered by Muzan.

Trivia

• The kanji in Chachamaru's name means "tea" (茶, cha^?) and "circle, round" (丸, maru^?), with 々 being an iteration mark.
• Chachamaru's gender is presumably male, as it is described to be the manliest cat ever, and listed as male in the Missing Cat poster in Kimetsu Academy.
  • This would be an unusual case, as calico cats are biologically predominantly female, except under rare genetic conditions.
• Chachamaru is one, if not only, of the demons that was never human to begin with.
• In Kimetsu Academy, Chachamaru is a cat belonging to Yushiro's family. He was brought to school on a whim by Yushiro. There, the cat developed a fondness for the Health teacher, Tamayo, and began following him to school. However, due to the cat's lively nature, it proved challenging to confine her to the school's infirmary. As a result, Chachamaru was allowed to roam freely, eventually catching the attention of Gyomei Himejima, the Civics teacher, who believed the cat was lost and gave it the temporary name Iwao (岩 (いわ) 雄 (お) , Iwao^?).
• Chachamaru is the first and, likely, the only animal to become a demon.