Itachi had to admit, he was surprised that the gentle seeming Abel was from Kiri. His eyebrows went up a little, though he thought he was more surprised that Abel was telling him where he'd originated from. Itachi tried to keep up with major clans in other villages, but Kiri was mostly a mystery to him. No one was going to send the Uchiha heir undercover there, ANBU or no. He'd sort through the more subtle implications of Abel being from Kiri at a later date.

And then Abel stabbed himself. Itachi had to admit he tensed, Sharingan activating, unsure where this was going. He supposed to trusted Abel to an extent, but he didn't know the man well enough to know if he were being impersonated, or if something else were up. His mind was clicking through causes and responses the second the senbon pierced Abel's skin. A bloodline demonstration also wasn't what he was expecting.

Itachi was impressed, just a bit. Pulling out the Sharingan when not in a combat situation was rude, but he watched the demonstration with it anyway, intrigued. Chakra and blood to make a weapon. Itachi took the kunai that was offered, half expecting it to crumble in his hand.

"I can't say I've seen that before," Itachi admitted, the barest sliver of a smile on his face. It was a completely boy-ish smile, fascinated with his friends new trick and thinking how useful this could be.