Hikari showed no emotional change when the man got burned alive, he wasn't going to show remorse for every person that died. Once Caius began speaking on his information it seemed as if Hikari didn't care, which he really didn't. It was no secret that his clan was wiped out, but he was hardly a survivor of it. Being Lieutenant of Squad ten it also didn't hide he had intelligence and a fair bit of strength, so the words didn't faze Hikari. Though he did find it interesting how he knew about him killing the woman he loved, the rejections on the other hand....Well, everyone could guess that just by looking at him, but it didn't heavily concern him. It was honestly just something to pass the time, and got to the point where he would just do it out of boredom. 

The man obviously didn't know much though, like the speed he could think which was usually faster than his opponent's bodies could even react, in which his thoughts would be like a few seconds in real time. He also didn't know his training with Tabo as Tabo liked keeping secret and set up a way that no one would know what he did in his cave, even if they found a way to break through his security, so that helped keep their training a secret. "Well, stop talking and die then," Hikari said as he swung his Zanpakuto at Caius' neck with his sheath swung at Caius' legs, both coming from opposite sides.