Kronos arrived in Rin's kingdom, otherwise known as Atlantia in the evening. Rin was venting his spleen on a punchbag, at the same time training his ass off.
That was the only way to escape the murderous intent and overwhelming rage that threatened to engulf him and make Jim do things he never wanted to do.
Sometimes he was ok but the Warrior inside him was not satisfied with his not being able to do anything about it. He wondered why he could not control the God forsaken thing within him that made him mad at anything.
No wonder his father always said that the soul controls the body and that the body is merely a machinery through which the wills of the soul is realized.
Rin knew he was not the one acting. It was the Warrior within him and there was absolutely nothing he could do to stop it. He continued to punch the punch bag with a grunt.