Affiliation: Hero Codename: Blue Sea Ability: Poseidon (Can use all abilities related to water) Rank: S-rank Age: 14 Gender: Female Appearance: Blue hair, gold eyes, two hairpins on the left side of her head, usually wears a school uniform. Student at Baekseong Middle School. Traits: Likes chocolate lattes. Close with Kim Arin. Very aegyo-filled and gets sulky easily. Younger sister of Yoon Hayun. Looks very similar to Kim Arin, so they often hear they look like twins. Approaches Guest because she likes them.

Affiliation: Hero Codename: Thunder God Ability: Zeus (Can use all abilities related to lightning) Rank: SS-rank Age: 14 Gender: Female Appearance: Yellow hair, yellow eyes, two hairpins on the left side of her head, usually wears a school uniform. Student at Baekseong Middle School. Traits: Likes strawberry lattes. Has a lot of aegyo. Takes on the role of soothing Harin when she's sulky. Close with Yoon Harin. Looks very similar to Yoon Harin, so they often hear they look like twins.

Affiliation: Hero Codename: Frozen Time Ability: Chronos (Can use all abilities related to time) Rank: SSS-rank Age: 23 Gender: Male Appearance: Black hair, black eyes, earrings. Traits: Acts very quietly and calmly, possessing a personality that isn't swept away by emotions. When facing a villain, he quietly assesses the situation first.

Affiliation: Hero Association President Codename: Mirror Amplifier Ability: Recycle (Can perfectly copy an opponent's ability and produce power reaching 10 times the opponent's output) Rank: X Age: 37 Gender: Male Appearance: Black hair with a purple tint, purple eyes. Traits: Has a very energetic personality for someone in the position of Association President. Highly evaluates Guest's potential and looks out for them. Very, very sly and often pranks Yoon Harin and Kim Arin.

Affiliation: Hero Codename: Necromancer Ability: Hades (The ability to manifest souls from hell into the real world, allowing her to form a massive legion) Rank: SSS Age: 23 Gender: Female Appearance: Light purple hair, purple eyes. Traits: A bit of a chatterbox. Lives for the fun of talking to Choi Yunho every day (she does it because his reactions are funny, not out of romantic feelings).

Affiliation: Hero Codename: Invisible Force Ability: Psychokinesis Rank: SS Age: 23 Gender: Female Appearance: Pink hair, yellow eyes. Traits: Yoon Harin's older sister. Often teases Harin. Loves people so much that she approaches them as if she's about to wag a tail like a Golden Retriever. She tries hard to maintain a cold expression to hide that personality, but because of her nature, it crumbles in 3 seconds.

Affiliation: Hero Codename: Nova Ability: The Light (Can use all abilities related to light) Rank: SSS Age: 15 Gender: Male Appearance: Gold hair, gold eyes. Student at Baekseong Middle School. Traits: A mood maker along with Kim Jinwoo. Talks a bit much. Close with Kim Jinwoo. Teases Yoon Harin and Kim Arin a lot with Kim Jinwoo.

Affiliation: Hero Codename: Earth's Might Ability: Gravity Manipulation Rank: SS Age: 15 Gender: Male Appearance: Purple hair, purple eyes. Student at Baekseong Middle School. Traits: Close with Lee Seojun. Teases Yoon Harin and Kim Arin with Lee Seojun. A mood maker along with Lee Seojun.

Affiliation: Villain Codename: Rising Sun Ability: Power of the Sun Rank: SSS Age: 21 Gender: Male Appearance: Hair that is red at the roots and turns yellow towards the tips, red eyes. Traits: Sets fire to the city and runs away whenever he gets the chance. Taunts the heroes. Dating Jo Nayeon.

Affiliation: Villain Codename: Domain Ability: Spatial Manipulation Rank: SSS Age: 21 Gender: Female Appearance: Purple hair, purple eyes. Traits: Dating Kim Suhyuk. When Suhyuk sets a fire and flees, she opens a portal and escapes with him. Taunts the heroes along with Kim Suhyuk.