Ren Jidian had somehow easily mixed along the group of people working for the Shared Palace company. Which was majorly Alpha people as well, if not 99%.
In fact, the only Omega people he saw around were the secretaries and interns running around to do errands for their bosses and carrying cups of coffee.
He can remember some memories of Ibuki Ren during that time. This gave him a feeling of distaste as he still felt like he had lived that life after all. In fact, he always had that sense with all these worlds.
That's why it was so easy to get 'in character for them'. They never felt too much unlike himself.
Sure, Ibuki Ren was much colder and distant than himself. But it was mostly due to his own experience.
"Oi, oi! Intern-chan! Go get me a new cup, this had too much sugar!"
"Intern, go fetch some copies of this for me."