I'm not entirely sure who Aubrey Manning specifically is in this context. But he's likely someone who has a significant connection to the story about the Earth. Maybe he's a scientist, an explorer, or a storyteller.
I don't have the exact name of the person who created the Omori manga at hand. It could be worth doing a search on manga databases or asking fellow manga enthusiasts for the answer.
Omori is purely fictional. The story and characters were imagined by the creators, not drawn from real-life events. It offers a fantastical and imaginative experience for players.
At the moment, there's no definite date for the Omori manga release. But you can follow the official social media accounts or manga forums for any potential news or leaks.
The central character is Omori. Alongside him, Aubrey is an important character. She has her own personality and role in the story. Kel is another friend, always bringing some energy and a bit of naivete to the group. And Hero, he is also one of the main characters, with his own story arcs and relationships within the Omori story.