Original Name: Gate: Jieitai Kano Chi nite, Kaku Tatakaeri
When a portal from another world appears in Ginza, Tokyo, a legion of soldiers and monsters emerge to attack the city. 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. 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.
The protagonist of the series, Itami is a 33-year-old otaku and JSDF soldier. 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. 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.
Tuka Luna Marceau
A 165-year-old elf, though she is considered an adolescent by her race’s standards. 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. However, she has a hard time coping with her father’s death, and eventually starts viewing Itami as her surrogate father. After overcoming her loss with Itami’s help, she keeps calling him “father” just by habit, much to his chagrin.
Lelei La Lelena
A 15-year-old human from the other world, and a student to an elderly sorcerer. Lelei quickly learns the Japanese language and becomes the interpreter/translator for Itami’s party. Leilei serves as the narrator for the anime. 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.
A 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). Her body will remain that way until her 1000th birthday when she will ascend and become a full goddess.
That also means she cannot die and can recover from any wound. She’s superhumanly strong which allows her to swing her extremely heavy halberd with ease. She is also very fast and agile with centuries of combat experience. She’s usually dressed in her formal apostle wear which strongly resembles gothic lolita fashion. After meeting Itami and his squad, she takes an interest in them and Itami in particular who she occasionally attempts to seduce.
Yao Haa Dushi
A dark elf who is over 300 years old. She seeks the JSDF’s aid when the same dragon that attacked Tuka’s village moves to the forest where her tribe lives, becoming a threat to them. After the dragon is vanquished, she joins Itami’s party as well. She also changes her name to Yao Ro Dushi after the dragon’s defeat and offering her servitude to Itami, unlike the three, she isn’t relentless in pursing the latter’s affections and prefers to be on the sides. unlike Tuka’s tribe who settles in the forest, her tribe inhabits caves or any area near the mountains.