Beowulf (Super Robot Wars)

Beowulf is a villain from the Super Robot Wars Original Generation series. He is the Shadow Mirror counterpart of Kyosuke Nanbu and is known for his near-demonic power. He pilots the Alt-Eisen Nacht, a blue-painted version of Kyosuke's red-painted Alt-Eisen.

Origin
In the Shadow Mirror universe, just like the original universe, Kyosuke Nanbu and Excellen Browning was involved in a shuttle accident triggered by the Einst. Unlike the original universe, Excellen died in that accident and was eventually resurrected without her memories as Lemon Browning, while Kyosuke ended up being turned into Einst in place of Excellen.

He would spend his life normally like the normal universe afterwards, but without the perky Excellen to counterbalance his stoicism, Kyosuke became more and more deluded into the Einst's goal, to destroy the world and recreate it anew. Along with that, he developed a nasty habit of messily murdering his opponents and sometimes even his allies. This change was extremely drastic that he eventually devolved into babbling nothing but his goal to recreate the universe in disjointed speech. Along with that, he started showing demonic powers that he ended up using to kill those who get in his way. With his squad, the Beowulves, he more or less controlled the corrupted EFA in the Shadow Mirror universe, to which his former teammate Axel Almer was disgusted and switched sides to the Shadow Mirror, only to stop him from further wrecking his world.

Original Generation 2
Beowulf is first seen during the prologue of the GBA version of OG2. At this time, nothing was known of him except his near-demonic power, but overall it was noted that this is more or less the same heroic Kyosuke. Axel stalled him so the Shadow Mirror can escape to the OG universe, a mission he succeeded. Beowulf wouldn't make another appearance afterwards.

Original Generations
Beowulf is spotted at the end of the 3rd mission of OG2 section of Original Generations, where it became clear that Beowulf is an Einst-possessed Kyosuke rambling about recreating the world in his image. His role is more or less the same and he is never seen again afterwards.

Original Generations: The Inspector
The first episode of the animated adaptation of OG2 showed Beowulf's brutal nature, as he single-handedly annihilated and murdered the Shadow Mirror version of the SRX Team, before eventually confronting and was stalled by Axel. Unlike the game counterpart, Beowulf doesn't carry his own squad of robots, he works alone, it is implied that he probably murdered his whole squad for no reason in this continuity.

At the end of the series, Beowulf makes a jump to the OG universe, planning to restart his reign of terror and recreate that certain universe. However, standing in front of him were not just Axel, but also the whole Hagane, Hiryuu and Kurogane squad, including his OG counterpart Kyosuke. Even though Axel was knocked out and presumably KIA in the battle, during their previous battle, he has planted his Soulgain's arm somewhere within the body of his Nacht. This very arm is used by Kyosuke and the rest of his teammates to mortally wound Beowulf and killing him for good.