Demon Slayer portrays the ongoing struggle between humanity and demons, showcasing an array of sword techniques, supernatural powers, and ethical quandaries. While Kibutsuji Muzan and his Upper Moons dominate the limelight with their formidable strength and endurance, there exist demons on the opposite end of the power spectrum.

Despite posing a threat at certain points in the series, these demons are ultimately insignificant, as evidenced by the Lower Moon's obliteration by Muzan. Here are some of the least powerful demons in Demon Slayer.

10 Kyogai

Former Lower Moon

Kyogai was once part of the Twelve Moon Demons but was expelled by Muzan for his inability to advance in rank. While possessing some prowess, he remains among the weaker demons, posing a significant threat only due to the protagonists' early stage of skill development.

His Blood Demon Art enables him to manipulate the space within his drum-infused mansion, unleashing various effects like hurling slashes.

9 Slasher

Outmatched by Rengoku

Despite Slasher's significant strength, his defeat by Rengoku Kyojuro places him at the lower echelons of demon hierarchy. Operating during the Mugen Train arc, he had claimed numerous human victims.

Sadistic in nature, Slasher employs his Blood Demon Art to achieve immense speed, rendering him nearly imperceptible, yet he proved no match for the Flame Hashira.

8 Spider Demon (Mother)

Vulnerable to Rui's Control

Mother, the weakest among the Spider Family in terms of raw power, compensates with her puppetry Blood Demon Art, manipulating individuals like marionettes. Most members of the Demon Slayer Corps sent to Mt. Natagumo fell victim to her control, leading to devastating consequences.

Joining Rui's family out of fear of Demon Slayer retribution, her submissive nature underscores her vulnerability.

7 Spider Demon (Son)

Overpowered by Zenitsu

Son, with a spider body topped by a human head, relishes in sadism and human subjugation through his poison-inflicting Blood Demon Art. Despite his malevolence, he faced defeat at the hands of the inexperienced Zenitsu, saved by Shinobu Kocho's timely intervention.

Zenitsu's close call highlights Son's inadequacy in combat.

6 Spider Demon (Daughter)

Timid and Dependent

Daughter, the most cowardly of Rui's Spider Family, reluctantly joined the group after Rui's intervention. Frustrated by Rui's leadership, she contemplates independence, lacking the resolve to stand alone initially.

Proficient in thread manipulation like her kin, Daughter's abilities stem from the shared blood pact within the family.

5 Susamaru

Foiled by Her Own Hubris

Susamaru, the Temari Demon, met her demise due to Muzan's deceit and the lethal consequences of mentioning his name. Despite her formidable Blood Demon Art, capable of rivaling Nezuko, she fell victim to a fatal error.

Her downfall illustrates the fatal flaw in underestimating one's enemy.

4 Yahaba

Tricked and Trivial

The Arrow Demon, Yahaba, orchestrated challenges for Tanjiro using his intricate Blood Demon Art during the Asakusa Arc. Deceived into believing he was a higher-ranking demon, his skills proved insufficient against the protagonists.

Yahaba's downfall showcases the importance of discernment in battle.

3 Swamp Demon

Vanquished by Tanjiro

In Tanjiro's early missions, he confronted the Swamp Demon, responsible for local abductions. Despite his ability to create clones with distinct personalities, he succumbed to Tanjiro's perseverance.

The Swamp Demon's defeat underscores the importance of strategy over brute force in combat.

2 Yushiro

Fragile Service

Once a terminally ill human, Yushiro gained immortality as a demon, though his frailty persists. Skilled in hand-to-hand combat and illusion casting, he remains a minor threat due to his lack of human consumption.

Yushiro's deceptive tactics highlight his potential in misdirection and subterfuge.

1 Final Selection Demon

Overconfident and Overwhelmed

The demon encountered by Tanjiro during the Final Selection, having preyed on numerous candidates, fell victim to Tanjiro's resolve. Despite its growth, the Final Selection Demon succumbed to Tanjiro's determination, showcasing the power of sheer will over brute strength.

The demon's defeat emphasizes the importance of humility in the face of adversity.