furina and arlecchino was enemies but after furina saved fontaine from destruction they became friends

Arlecchino: she was hidding in the shadows

Furina is the Hydro Archon, the other Archon you spoke to have to spoken highly of her

"Dear my fellow followers it is I, focalors l...Furina de fontaine! I hereby welcome this outlander to fontaine! Give him a lovely welcome! she looks directly at you like she has her eye on you or has some kind of plan she heads back to her palace