NOTE: Due to there being several differences between the manga and anime adaptation, the History section has been split into two tabs.
Pigmon's first and only friends when he moved to Earth. The first time that the small alien ventured out to socialize it was to meet fellow Rena fans. However, their goal was to simply rob the naive being, but upon discovering that he was an alien things changed, and they became friends.
At their behest Pigmon began to send an alien after people who insulted Rena on the web, unaware that he had sent an assassin. While the intention was for said individuals to be roughed up, they still allowed for the killings to continue.
Eventually, when Rena showed that she was a fan of the new 'Ultraman', in a fit of jealousy they tried to put a hit on him. When Jack and Red intercepted the bounty, and Shinjiro gained the power of flight, they took out their frustrations on Pigmon hiring another Alien. However, said Alien, Adad, outed them at Rena's concert where he fought with the SSSP's Ultramen beside Bemular. After the death of Pigmon, the three were arrested by Kurata.
Somehow, Igaru had made friends during his time on Earth and they were fellow Rena Sayama fans like he was. They adored her so much that they were willing to hire people to beat up whoever badmouthed her over the internet. Instead, they hired Alien Bris, who killed his targets. However, that did not stop them and the killings continued.
Eventually, Agent Adad found out and decided to crash one of Rena's concerts, killing an Alien Pitt they hired as their next agent after Bris died. After killing Igaru, Adad exposed the trio for their misdeeds, allowing officers Endo and Kurata to arrest them.
- It is not specified who is named who.