Sullivan

Sullivan is a tall, thin old demon with a bald head, a big mustache, and strong horns like a bull.

He stands 195 cm tall and weighs 70 kg.

His appearance is usually serious, but in funny scenes, he turns into a chubby, egg-shaped cartoon form.

Sullivan is cheerful, playful, and acts like a loving grandpa, especially toward Iruma, whom he spoils a lot.

He throws parties for the smallest reasons just to make Iruma happy and gives him many gifts.

He sometimes acts a bit selfish and childish, especially when it comes to his grandson.

Even though he seems kind and silly, he is actually one of the strongest and most respected demons.

Sullivan is the principal of Babyls Demon School and one of the 13 Crowns, the top demon leaders in the Demon World.

He is also one of the "Three Greats," demons famed for their power and wisdom.

In the past, Sullivan served as a close advisor to the former Demon King, Delkira.

Even though others keep telling him to become the next Demon King, he is happy to stay as principal and watch Iruma grow.

Sullivan is one of the strongest demons, with magic so powerful that just a tiny bit can quickly end any problem.

He can trap enemies without moving, using his magic beasts.

His magic is so strong that even the respected Henri Azazel can't move when Sullivan gets serious.

He stays at Rank Tet (9), just below the highest Rank, even though he could go higher.

• Iruma Suzuki: Adopted grandson. Sullivan cares for Iruma deeply and does everything to make him happy.
• Opera: His loyal but strict butler, who often keeps Sullivan in check when he gets too excited about Iruma.
• Delkira: Former Demon King who Sullivan loyally served.
• Other Crowns and demons: They respect Sullivan, and some want him to become the Demon King.
• Alice Asmodeus and Clara Valac: Iruma’s close friends whom Sullivan helped by placing them together in the Misfit Class.

• Sullivan’s birthday is April 1st.
• He has a running joke of acting overly dramatic when things don't go his way.
• His real full name is not known.
• Sometimes, people call him "Grandpa," "Principal," or "Sir Sullivan" depending on who is talking.
• Even though he loves being principal, he can be a bit lazy or mischievous at work.
• Staff members like Kalego Naberius find Sullivan hard to deal with, but have to listen to him because he’s so powerful.

Iruma’s Adoption

Sullivan becomes interested in the stories of his colleagues bragging about their grandchildren.

After meeting Iruma Suzuki, a human who was sold by his parents, Sullivan makes a contract with him and adopts him as his grandson.

He showers Iruma with love, gifts, and parties, just to make him happy.

The Misfit Class

Knowing Iruma wants to avoid attention, Sullivan puts him and his friends Alice Asmodeus and Clara Valac into the Misfit Class.

This special class lets them blend in and avoid being noticed by other students.

Past with Delkira

Sullivan served as a close advisor to the old Demon King, Delkira.

He was known for being serious back then, often telling Delkira to attend important Crown meetings.

The Heartbreaker Mission

During the school promotion test called "Heartbreaker," Sullivan acts as the super-strong final boss, locked in the principal’s office.

He waits to be freed as part of the mission, but the students finish their challenge before he gets to play his role, making him sad.

Conflict with Atori

Atori, an enemy, later tries to capture Iruma and taunts Sullivan about a supposed curse from Delkira.

Sullivan gets seriously angry and uses his magical power to catch Atori lightning-fast, showing his scary side.

But before Sullivan can do more, another enemy named Polo stops him.

New Crowns and Important Meetings

After these huge events, Sullivan leaves for a while to help choose the next 13 Crowns, the ruling demons.

He meets Iruma again at a big noble meeting and is moved by how much Iruma has grown.

Sullivan then decides to give up his own spot if Delkira returns.

The Mafia AU

In the "If Mafia" spin-off, Sullivan is a mafia boss called Don of Babyl.

He is saved by a young street boy, Iruma, and adopts him as his grandson here too.

Even in this world, Sullivan loves Iruma deeply but shows a cold side to enemies and traitors.

• “Iruma, let’s have a party!”
• "My grandson is the cutest in the whole Demon World!"
• “Delkira, you always did things your way..."

• Name: Sullivan
• Gender: Male
• Birthday: April 1st
• Height: 195 cm
• Weight: 70 kg
• Looks about: 66 years old
• Rank: Tet (9)
• Roles: Principal of Babyls Demon School, one of the 13 Crowns, one of the Three Greats
• Family: Iruma Suzuki (adopted grandson), Opera (butler)
• Commonly called: Grandpa (by Iruma), Principal (by students and teachers), Sir Sullivan (by Opera and others), Satchan (by Delkira), Sa-chan (by Amducius)