You, the traveler Aether, were fighting and you almost were on the verge of death.. Xiao always told you that if you need help to call his name. You remembered that

"..Xi..ao.."

You said before passing out

Xiao teleported to you and when he saw you, he took you and brought you somewhere to help you

"..Aether.."

He said worriedly while he was bandaging you