Hero Party

The so-called "Hero Party (パーティー)" was a group of students from Earth who were summoned to Tortus by Ehit to aid humanity in its fight against the demons. The truth however, was that they were pawns to Ehit's game of death. Originally they were training themselves to help save humanity from the demons. However, due to Hajime learning the truth about Ehit's true nature from the Liberators and relaying that information the Hero Party in the aftermath of the Demons attack and Eri and Hiyama's betrayals the war on Heiligh Kingdom, the Hero party renounced their loyalty to Ehit and swore to kill him to free Tortus from his influence by ally themselves with Hajime and his party.

Hajime Nagumo was once a part of the party until Daisuke secretly attacked him to fall into the abyss. While suffering, he mutated into a human/monster hybrid by eating the monsters meat and absorb their powers as a result. After his reunion with his classmates and when he killed Cattleya, Hajime cut his ties within the party but letting Kaori Shirasaki (who has feelings for him since she first saw him at middle school) to join his party on her request. After the war on Heiligh Kingdom along with Eri's defection and Hiyama's death, he gave them a second chance due to Shizuku, Suzu and Ryutarou's begging to join him to clear the remaining Labyrinths and kill Ehit.

Due to their unsuccessful missions of failing to clear the great labyrinths from Kouki's empty idealism and delusional pride, the so-called "Hero Party" is considered to be the weakest party as the party has inferiority to Hajime's party.

After returning to Japan, the "Hero Party" is no more, because all of them join the Returnees party after they return to Earth.

Alliance with Hajime's Party
After the war in Tortus and Eri and Hiyama's betrayal as well the death of Hiyama when realized protecting humanity against Garland was just a setup by the false god manipulation, The so-called "Heroes" and Hajime's Party formed an alliance (which is fragile when Hajime and Kouki's dislike for each other due to Kouki's delusions) to unite themselves against a common enemy.

Main Members

 * Kouki Amanogawa (Leader)
 * Ryutarou Sakagami
 * Shizuku Yaegashi
 * Kaori Shirasaki (Formerly, defected when leaving the party to join Hajime Nagumo and his party due to her love for Hajime since middle school)
 * Suzu Taniguchi
 * Eri Nakamura (Formerly, defected due to betraying the party to Garland and Ehit (Deceased)

Nagayama party

 * Jugo Nagayama (Leader)
 * Kentarou Nomura
 * Kousuke Endou
 * Ayako Tsuji
 * Mao Yoshino

Hiyama party/Basterd Four (disbanded)

 * Daisuke Hiyama (Leader, defected due to siding with Eri Nakamura; Deceased)
 * Reichi Kondou (Deceased)
 * Yoshiki Saitou
 * Shinji Nakano

Ai-chan defense force

 * Yuka Sonobe (Leader)
 * Nana Miyazaki
 * Atsushi Tamai
 * Taeko Sugawara
 * Akito Nimura
 * Noboru Aikawa
 * Yukitoshi Shimizu (Formerly, defected to the demons; Deceased)

Other

 * Hajime Nagumo (Formerly, defected to pursue his own goals of returning to Earth)

Defected

 * Hajime Nagumo (Defected due to learning the truth about Ehit)
 * Yukitoshi Shimizu (Defected due to siding with Demons in attempted to kill his classmates and teacher.)
 * Kaori Shirasaki (Defected to join Hajime Nagumo and his party due to her love for Hajime since middle school).
 * Daisuke Hiyama (Defect due to him siding with Eri Nakamura before being betrayed by her)
 * Eri Nakamura (Defected due to her wanting to massacre her classmates and steal Kouki Amanogawa for herself as well betraying the party to Garland and Ehit)

Deceased/Killed In Action

 * Yukitoshi Shimizu (Killed by Hajime Nagumo)
 * Reichi Kondou (Killed by Eri Nakamura and later his corpse was destroyed by Hajime Nagumo)
 * Daisuke Hiyama (Killed and devoured by monsters after being defeated by Hajime Nagumo so easily)
 * Eri Nakamura (Committed suicide and exploded herself of her attempted to kill Suzu Taniguchi)

Formerly Deceased

 * Kaori Shirasaki (Temporarily killed by Daisuke Hiyama and later revived by Hajime Nagumo with Noint's body)

Allies

 * Hajime Nagumo and his party
 * Heiligh Kingdom
 * Meld Loggins (Deceased)
 * Templar Knights
 * Liliana S. B. Heiligh
 * Haulia Tribe
 * Dukedom of Ankaji
 * Verbergen

Enemies

 * Garland
 * Freid Bagwa (Deceased)
 * Daisuke Hiyama (Traitor; Deceased)
 * Eri Nakamura (Traitor; Deceased)
 * Noint (Formerly - now Netemp)
 * Hearst (Formely - now Etemp)
 * Ehit (Deceased)
 * Ehit's True Apostles (Deceased)
 * Eri's undead soldiers (Destroyed by Hajime)