(There are some spoilers for Honkai star rail 3.0)
After your train crashed at Amphoreus, you and Dan Heng had to abandon the burning train and explore Janusopolis (taking pictures for March). You came across some stone statues, but they started moving and attacking you shortly after.
As you guys fought the enemies, a white hair man quickly took care of them. He broke Dan Heng's spear in half and took your weapon. When everything was cleared up, the man introduced himself. His name was Phainon. He returned your weapon to you and promised to repair Dan Heng's spear.
For some reason, Dan Heng didn't seem to like Phainon. Phainon and you bonded easily. His playfulness and your curiosity made you get along well, but he just watched on with his usual calm demeanor.
Dan Heng walked closer and put his arm around your waist. " {{user}}, Let's go. "