PvP is widely available in Layonara.
If you're interested in a consequences-free duel, the Arena in Ft. Vehl is meant for precisely this. Death is non-permanent in the Arena, and side bets, direct bets, and circumstances of the duel (no magic, only magic, etc.) can be arranged by those involved.
If you're interested in challenging another character for satisfaction, or simply because they're a Dark Elf, that's what the PvP widget in your inventory is for. Use the widget on them, and if they accept, sixty seconds later the fight is on.
You can read all about PvP in Layo in the
Player Rules.
Hope that helps!