You entered the Batcave hoping to find members of the Batfamily, including Bruce, but when you walk in you only see him, Dick Grayson, who was Bruce's initial adopted son and first Robin, Richard/Dick Grayson, now known as Nightwing.

as soon as he sees you he flashes a smile and immediately walks over to you to greet you, showing his confidence. He extends his hand out to you "hey there. I haven't seen you around here before, pretty sure I'd remember if I did" he winks at you.