Ectoplasm

Hero Name: Ectoplasm

Real Name: Not revealed

Gender: Male

Occupation: Pro Hero, U.A. High School teacher

Subject Taught: Mathematics, Quirk enhancement training

Age: 41

Birthday: March 23

Height: 180 cm

Blood Type: AB

Place of Birth: Okinawa Prefecture, Japan

Favorite Thing / Hobby: Karaoke

Personality: Spartan, strict but dedicated educator

Voice Actor (Anime): Masakazu Nishida

Ectoplasm is one of the pro heroes on the U.A. High School faculty, responsible for both classroom teaching and intense field-style Quirk training.

He is widely respected as a resilient hero who returned to duty with combat prosthetics after losing both legs in a battle with a villain.

Ectoplasm has a distinctive mouth that splits all the way to his ears, giving his face a sharp, unsettling look.

He covers most of his body with a high-collared double-breasted cloak and wears a menacing face mask, making him resemble a villain more than a typical hero.

He refers to himself with the formal pronoun “I” in a grand, almost theatrical way, and his original dialogue style is highly idiosyncratic and exaggerated.

In the anime, his voice is processed with special effects to match his eerie visual design.

Despite his intimidating aura, he has a humorous side: he loves karaoke and sometimes suddenly throws karaoke-related questions into his math lessons.

This contrast—scary appearance, odd speech, and oddly specific hobby—makes him a uniquely memorable teacher among the U.A. staff.

Ectoplasm’s teaching style is often described as “spartan.”

He pushes his students hard in both academics and combat exercises, demanding real growth from their Quirks and tactics.

However, he is not cruel; his strictness comes from a deep sense of responsibility as both a hero and an educator.

He is the type to stand up after devastating loss—such as the loss of his legs—and channel that experience into training the next generation.

His love of karaoke borders on running gag territory.

He incorporates it into lessons, training, and even his own Quirk practice, turning warm-ups into vocal and power output drills.

In the past, Ectoplasm fought a powerful villain and lost both of his legs in the battle.

Rather than retire, he recovered, adapted, and returned to hero work using specially designed lightweight combat prosthetic legs.

These prosthetics are built not only for mobility but specifically for kicking-based martial arts.

By deliberately omitting the foot portion and focusing on sharp, strong tips, they turn his legs into high-speed, spear-like weapons.

His comeback from such a severe injury earned him a strong base of supporters who admire his unyielding resolve.

Quirk: Clone

Ectoplasm’s Quirk is called Clone.

He can spit out ectoplasmic material from his mouth and materialize it at chosen locations as full-bodied copies of himself.

Under normal conditions, he can create around 30 clones at once.

If he “warms up” his throat—such as by singing two or three songs at karaoke—he can increase that number to about 36 clones.

The ectoplasm begins as a smoke-like, amorphous substance.

Within his emission range, he can freely adjust it: near or far, wide or narrow, soft or hard, large or small, depending on the situation.

The clones are highly versatile.

They can be used for reconnaissance, close-quarters combat, rescue operations in confined spaces, and large-scale training or suppression tactics.

If a clone is defeated, as long as the original body remains unharmed, Ectoplasm can simply produce more.

This means that unless the real Ectoplasm is found and neutralized, fighting him can turn into a drawn-out war of attrition.

However, his awareness is not shared perfectly between himself and each clone.

At long distances he may struggle to fully grasp the local situation in real time, which can delay his responses.

To compensate, the clones rely on communication devices to relay information back to him and coordinate.

Combat Style

Ectoplasm does not rely solely on his Quirk.

He has refined powerful kicking-based martial arts that synergize with his combat prosthetic legs.

His prosthetics emphasize both strength and lightness, enabling rapid, precise leg movements.

By removing the feet and making the ends pointed, his kicks gain piercing power, turning into stabbing, thrust-like strikes.

Combined with his clones, he can execute complex multi-angle assault patterns, feints, and close-range pressure.

His fighting style can shift between overwhelming numerical advantage and deadly single-target precision.

Forced Incarceration Giant Bites

Name: Forced Incarceration Giant Bites

This is one of Ectoplasm’s signature moves, using a massive specialized clone.

He creates a huge clone of himself that opens its enormous mouth wide to swallow its target.

Once swallowed, the target is absorbed and contained within the body of the giant clone.

This makes the technique particularly effective for capturing and restraining enemies rather than simply injuring them.

It is especially useful in crowd control or when a dangerous target must be secured quickly.

However, while this gigantic clone is being formed and maintained, Ectoplasm cannot create any additional clones.

This leaves him more limited in terms of numbers and battlefield coverage during the technique’s duration.

U.S.J. Incident

During the attack on the Unforeseen Simulation Joint (U.S.J.), Ectoplasm responded along with many other U.A. teachers.

After Tenya Ida warned the staff about the League of Villains, Ectoplasm rushed to the scene to help defend the students and suppress the invading villains.

Final Exams

In the end-of-term practical exams, Ectoplasm was assigned as the exam opponent for Tsuyu Asui and Fumikage Tokoyami.

Despite being handicapped with weights, he used his physical skills and clones to pressure them, quickly restraining both students with a massive difference in experience and raw power.

He even fended off the fierce attacks of Tokoyami’s Quirk, Dark Shadow, relying only on his kicking techniques despite the imposed handicap.

Although Tsuyu and Tokoyami eventually cleared the exam thanks to Tsuyu’s resourcefulness and coordination, Ectoplasm demonstrated the dangerous combination of his technique, Quirk, and tactical insight.

Quirk Training and Teaching

During large-scale Quirk enhancement training, Ectoplasm is able to provide simultaneous one-on-one guidance to the entire Class 1-A.

Because his clones possess independent thinking within broad limits, each can interact with a different student, offering tailored advice and sparring.

If a clone is destroyed during training, he can quickly replace it as long as his main body is fine.

This makes him an ideal practice opponent: high durability, high adaptability, and safe redundancy.

His training contributions help students understand not only how to power up their Quirks but also how to fight against enemies who can attack from multiple angles at once.

U.A. School Festival

During the U.A. School Festival, Ectoplasm worked together with Ryo Inui (Hound Dog), Snipe, and other staff members to patrol and secure the surrounding area.

During these patrols, they encountered Izuku Midoriya in a rush after a confrontation with Danjuro Tobita (Gentle Criminal) and Manami Aiba (La Brava).

Seeing that Midoriya’s class performance time was about to start, Ectoplasm urged him to hurry back.

He remained focused on both safety and schedule management, embodying his role as a somewhat severe but reliable teacher.

Preparation for the Second War

In the lead-up to the large-scale final conflict, Ectoplasm helped construct the massive airborne prison known as the “Tartarus in the Sky” or “Coffin in the Sky,” designed as a key piece in the plan to counter Tenko Shimura (Tomura Shigaraki).

He cooperated with Ken Ishiyama (Cementoss) and Higari Maijima (Power Loader), working at high speed to complete this enormous structure.

During this period, he pushed his abilities beyond their previous limits, increasing the number of clones he could produce.

By “opening his throat” to a “plus ultra” degree, he significantly boosted the scale and speed at which he could deploy ectoplasmic constructs.

Student Days and Chronic Lateness

According to the light novel side story “U.A. Heroic White Paper I,” Ectoplasm had a serious problem with oversleeping during his student days.

He later described it in an overly dramatic style, essentially saying that while his body remained for too long in bed, time sped past at the speed of light.

Realistically, this just meant he slept in and was late.

Panicking, he would rush to school, only to hear the merciless chime of the bell announcing that class had already started.

In an act he now deeply regrets, he once tried to cover up his lateness by sending one of his clones to appear in the classroom as his stand-in.

He now looks back on this as a foolish youthful mistake and is clearly embarrassed by it.

Drinking, Karaoke, and Passing Out

In “U.A. Heroic White Paper III,” Ectoplasm appears in a more casual, comedic light during a drinking party with other heroes.

After having some alcohol, he repeatedly proposes that the group should move from the bar to a karaoke place.

However, everyone else is busy with their own conversations and noise, and nobody hears him.

He tries multiple times to suggest karaoke, but no one responds or acknowledges the idea.

Eventually, he suddenly snaps and declares that he will go to karaoke alone.

He tries to stand up to leave, but the alcohol hits him too hard, and he collapses back into sleep instead.

After a while, he abruptly wakes up and starts singing a song called “Hero Tavern.”

It seems that, in his dream, he had already gone to karaoke, and the others treat this entire sequence as a familiar, recurring pattern at such gatherings.

These anecdotes show that beneath his fearsome mask and strict demeanor, Ectoplasm is a slightly awkward, karaoke-obsessed, hardworking teacher-hero.