Leech Devil

The Leech Devil is a devil whose form is inspired by leeches, appearing with four legs and two arms, giving her a grotesque, monstrous silhouette.

She is portrayed as female and is strongly driven by emotion rather than strategy or logic.

She refers to the Bat Devil as “my man,” clearly viewing him as her lover or partner.

Together, she fantasizes about eating every last human, treating mass slaughter as a twisted romantic dream.

Her personality is highly emotional and impulsive.

She goes along with the Bat Devil’s ideals, reacts dramatically to events, and tends to act based on feelings rather than careful planning.

The Leech Devil also shows a peculiar appreciation for human appearances.

She sympathizes with the Bat Devil’s tendency to spare humans with faces he likes, and she herself seems to be attracted to “good-looking” faces, similar to the Fox Devil’s apparent fondness for attractive prey.

The Leech Devil appears as an enemy of Denji and Power, opposing them shortly after the events involving the Bat Devil.

Her motivation is closely tied to avenging or continuing the Bat Devil’s will and pursuing her shared dream of consuming humans.

She attempts to kill Denji and Power in battle, confronting them with her monstrous form and vicious intent.

Despite her ferocity, she underestimates the strength and teamwork of devil hunters and their contracted devils.

During this confrontation, Aki Hayakawa intervenes to protect Denji and Power.

Aki summons the Fox Devil, who manifests and promptly devours the Leech Devil, ending her threat almost instantly.

This swift defeat highlights the power difference between a contracted devil like the Fox Devil and an unaffiliated devil like the Leech Devil.

Her role, while brief, helps showcase Aki’s abilities and the deadly efficiency of devil hunter contracts.

The Leech Devil is highly emotional and almost melodramatic in how she thinks and speaks.

Her devotion to the Bat Devil is obsessive, framing their dream of eating all humans as something romantic and beautiful.

She can be surprisingly sentimental, especially about appearances.

Her reaction to Denji’s face and her alignment with the Bat Devil’s preferences suggest that she judges humans partly by how much their looks amuse or attract her.

This emotional nature also makes her reckless.

Instead of retreating or planning carefully, she chooses direct confrontation and revenge, which ultimately leads to her demise.

As a devil, the Leech Devil embodies fear related to leeches, parasitism, and blood-sucking creatures.

Although the provided description does not detail specific techniques, she is implied to be dangerous enough to threaten humans and fight devils like Denji.

Her monstrous body, with four legs and two arms, grants her unnatural physicality suited for combat.

Even so, her power is not enough to withstand a high-level contracted devil like the Fox Devil.

Bat Devil

The Bat Devil is the central figure in the Leech Devil’s emotional life.

She calls him “my man,” clearly indicating possessiveness and romantic attachment.

She shares his dream of devouring all humans, turning genocide into a shared couple’s fantasy.

Her actions after his defeat are driven by loyalty and grief, as she tries to continue or avenge his will.

Denji

Denji becomes one of her primary targets.

She attempts to kill him during their clash, seeing him as an obstacle to her dream and her bond with the Bat Devil.

At the same time, there is a thematic echo in how she and the Bat Devil react to “good-looking” humans like Denji.

This detail emphasizes how devils, too, can have shallow or aesthetic preferences in their cruelty.

Power

Power is also on the Leech Devil’s hit list during the battle.

As a Blood Fiend and Denji’s ally, Power stands on the opposite side of the Leech Devil’s goals and worldview.

The Leech Devil’s attempt to kill Power further escalates the conflict.

Their clash helps show how different devils can have completely different loyalties and values.

Aki Hayakawa and the Fox Devil

Aki Hayakawa is the one who ultimately ends the Leech Devil’s rampage.

When he summons the Fox Devil, the massive fox head appears and instantly swallows her.

The Fox Devil’s swift, almost casual elimination of the Leech Devil demonstrates both Aki’s competence and the hierarchy among devils.

It also contrasts the Fox Devil’s “taste” in faces with the Bat and Leech Devils’ own fixation on attractive humans.