• the main cast is used again as members of Katagiri Squad

• there is also a demon who looks like Mira

• the One-shot has a Character who resembles Yūma Kuga

• multiple characters have horns similar to Trion Receptors

• Triggers are a thing but only two abilities has any resemblance to the main series, the ability in question are spikes like Speiraskia and Asteroid like bullets

• They seemingly can use something akin to trion bodies

The head of the central base has sent the ace soldier, Yūichi Jin, to help out the failing Base 7, and rescue his son Tadashi Yuiga, who is the leader there.

Unfortunately, the problem with Base 7 is, in fact, Tadashi. He's a terrible leader who cares for nothing but his own reputation and believes that being the central base leader's son allows him to do whatever he wants. Will Jin be able to fix this terrible situation?^[2]

• The Main Series reuses multiple characters, those being, Yūichi Jin and Yūichi Jin, Ruka Shinoda and Ruka Shinoda, and lastly, Yōtarō Shinoda and Yōtarō Rindō
  • There is also Makoto Yuiga, and Tadashi Yuiga, both of which share the same family name as Takeru Yuiga

• The reason why Jin from the main series calls himself the "talented elite" is possibly a homage to the One-shot's title

• The term Neighbors exists and are shown to be what we now know as Trion Soldiers

• • Additionally, this may be why trion soldiers are introduced to us as neighbors

• Border also exists but uses numbers instead of names

• Triggers are called neighbor-craft, but the two shown more closely resembles triggers from the main series,
  • Fūjinmaru is similar to Fūjin in name and premise as they both look like Kogetsu and have an extending blade
  • Escudo share the same name as Escudo and are extremely similar in premise, both being walls that come from the ground that act as shields but Escudo from the one-shot can be used as a weapon while Escudo from the main series can be used more akin to a trap