Who am I? Mask #8

In search of myself, when I started to observe my own behavior, I came to know about so many masks that I go on changing all the time. One moment it's a mask for a friend then the next moment it's for an enemy, for sister, for brother, for beloved, for boss, for servant and so on...

Who am I? Who is behind all these masks?

I am not a hawk but many times I behave like a hawk!