I'm not certain you would put this to better use than I would. Perhaps another time.

what does it mean ?
I'm a hero, and I already requested this item some time ago

For example, there are some items that require you to kill X mob before you can request, and it has a limited window to do it. Without knowing the mob or the item its hard to give a better answer.

when you don't complete the requirement the mob you are talking about says the following: How can I lay down my arms when that cursed fiend ***** wets his blades with my people's blood?

Your best guess is that he is a storm giant.
He is a member of the paladins' guild.
The paladin champion shows you his razor-sharp teeth.
The paladin champion is much larger than you.
He greets you warmly.

req ankh champ
The paladin champion says 'I'm not certain you would put this to better use than I would. Perhaps another time.'

nt