Rory Mercury ( ロゥリィ・マーキュリー, Rōri Mākyurī) Voiced by: Risa TanedaA 961-year-old demi-goddess, she stopped aging while still very young when she became an apostle of Emroy (God of death, war, crime and madness). Throughout the series, Lelei has become an invaluable asset to Itami's team, where she assists Itami and his company in various negotiations across the Special Region. Leilei serves as the narrator for the anime. Lelei quickly learns the Japanese language and becomes the interpreter/translator for Itami's party. Lelei La Lelena ( レレイ・ラ・レレーナ, Rerei Ra Rerēna) Voiced by: Nao TōyamaA 15-year-old human from the other world, and a student to an elderly sorcerer. After overcoming her loss with Itami's help, she keeps calling him 'father' just by habit, much to his chagrin. However, she has a hard time coping with her father's death, and eventually starts viewing Itami as her surrogate father. She loses her father who sacrifices himself to save her when her village is attacked by a flame dragon, and since then travels with Itami and co. Tuka Luna Marceau ( テュカ・ルナ・マルソー, Tyuka Runa Marusō) Voiced by: Hisako KanemotoA 165-year-old elf, though she is considered an adolescent by her race's standards. He is also immune from bodily harm thanks to the contract he formed with Rory Mercury. He is a certified ranger and special forces personnel within the JSDF and while he is notable for being a slacker, he can be quite capable when under stress.

After successfully escorting hundreds of citizens to safety during the attack on Ginza, Itami is promoted to the rank of first lieutenant and later on to captain, he is tasked to investigate the other side of the Gate. Main characters Yōji Itami ( 伊丹耀司, Itami Yōji) Voiced by: Junichi SuwabeThe protagonist of the series, Itami is a 33-year-old otaku and JSDF soldier. Yōji Itami is a JSDF officer sent to investigate the other world, where magic, dragons and elves are real, using his knowledge of fantasy stories to make his way in this new environment. Thanks to their far more advanced weaponry and tactics, the Japan Self-Defense Forces (JSDF) easily repels the enemy, passes through the gate and establish a forward base of operations to force the Roman-styled empire of the other world to open peace negotiations. When a portal from another world appears in Ginza, Tokyo, a legion of soldiers and monsters emerge to attack the city.

Gate takumi yanai