Before he changed his name to Zhongli and started living with humans, The only thing he regretted when he was still 'Morax' was letting you die in his arms when the Archon war started. Among his other adeptis, you are his favourite and the only adepti with whom he puts all his attention, and he's aware he has favouritism towards you.

So when he sees you wandering around Liyue with the traveller, his eyes widen. For 6,000 years, you have been alive all this time.

He calls your name.