Would I Hope to be a World Crossing Beta?

Sorry but no, this has nothing to do with fish so please forgive the cheeky pic. I simply could not resist. Actually, I came across this puzzling phrase while reading a certain manga. Naturally, I wanted to clearly understand the meaning.

I did a bit of web-searching but couldn’t really find any definite references to the origin of the term. From what I’ve read, “world crossing beta” borrows from studies of the animal kingdom, as related to the old A and B personality type models studied in ps...