Descriptions

Alliance

Future

A leading member of the Ushiromiya Group.
Between the time of Eva’s death and Ange succeeding her position, management of the Group has fallen to core members like him in her stead.

However, Ange has no desire to inherit that role, leaving the Group on the brink of fracturing internally and putting Okonogi in a difficult position.

He was once the president of a foodstuffs distribution company and had an intimate relationship with Hideyoshi’s business.

Because of that long-lasting association, Eva trusted him particularly, and he was appointed to an important post within the Group.

Theories

It seems this is canonically that same Okonogi, we fully expect him to be part of some conspiracy because why wouldn't he?
Did he play a role in planting the fake Eva in Kuwadorian? Maybe.
He probably wasn't a leader in the Ushiromiya group just two years after Higurashi, he rose up the ranks in the 12 years since.