Issues regarding Harry's new personality

I am writing this chapter so as to clear all issues regarding Harry acting in different ways in the story.

After merging with different souls Harry has become more pragmatic and calculative. He will be ruthless to his enemies and will not refrain from killing death eaters. But he is not unfeeling, he is quite kind and caring to those he considers friend much like the original Harry.

He can also be brash and reckless when under emotional duress (which will get better as his character develops). He is not the one to forgive and forget and can hold quite a grudge. His vengeful personality can make him come off as quite cruel at times.