My light brahmas are gentle giants.
In fact, I find light brahma roosters to be the best flock masters around.
Part of my chicken compound is a retirement villa - hens that are getting too old to be productive, but that I do not want to cull - are placed in there to live out the rest of their days.
The retirement villa consists of a nice sized henhouse with their own, private, fenced in chicken yard.
I always choose a light brahma rooster to be the flock master over the older hens, because they are so docile. And I will put two or three light brahma pullets in there with him, for egg hatching purposes.
The rest of the hens are older hens, and most of them much smaller than the brahmas.
But that is not a problem. The brahmas get along quite well with the older, mostly smaller spent hens.