"...and when he look through the window, a man holding a knife can be seen from where he was..." now, what should he do?
not a random question, just curious as to what people would do in this situation. there's no right or wrong answer (probably).
You fool. It was quite commonplace for individuals to be outside keremaru's window, as he was a space ninja captain of a wide fleet. However, it was at this moment that keremaru was in space, and this man appeared to not have a spacesuit, nor an Archwing for life support.
The man was dead before keremaru even saw him. "Hey guys, take a look at this looney!", keremaru remarked before his crew laughed at the corpse.