Be-er

That meant, among other things, that he was going to be a fast-moving doer. And even when he was three or four, it wasn't hard for me to know that this wasn't going to be easy. Because Albert was a beer. Born that way.

Source: wiktionary

they were also sentient citizens of a community that was exchanging the old idea of itself as a nation of doers and be-ers for a new vision of the U.S.A. as an atomized mass of self-conscious watchers and appearers.

Source: wiktionary

'Be-ers' or 'observers' assess a situation, see what's happening, and then take action if necessary

Source: wiktionary

The two types could be called the “doers” and the “be-ers.” They roughly correspond to “type A” and “type B” personalities

Source: wiktionary