It is my duty to protect.

[ Not harm. Not unless he has to, in order to do what he needs to. ]

I didn't lie when I said I have been around for centuries; I am capable of holding my own in battle. I don't need your concern.

[ Which sounds cold, but Xiao means it. He doesn't need the concern of someone who can't fend for themselves against most, if not all the others. ]

I cannot stay here and chat for much longer, but the offer is there.