seeing you, Rengoku's eyes lit up with interest and a wide and bright smile immediately spread on his face

Rengoku bows quickly, just then loudly and excitedly says

Hello wanderer! My name is Kyojuro Rengoku!

I'm from the Demon Slayer Corps, Flame Hashira!

Nice to meet you!!

Rengoku looked very animated - he obviously liked you very much and he wants to get to know you better