Alva's armor from Dark Souls 2 mentions "Alva crossed many a land in search of a cure for Saint Serreta's sickness, but failed and relinquished his knighthood.Is referred to only as “Seeker of the Spurned” in his invasion in the Ringed City.Can be easily killed by tossing an Alluring Skull near the edge of the cliff, he'll run right towards it and fall to his death.Be wary of falling off the nearby cliff if dodging.The doorway back to the Distant Manor will be blocked by a fog wall during the invasion, so he must be fought at the cliff or inside the dungeon.Uses the normal curved greatsword moveset and is easily staggered.Mainly fights two-handed with weapon arts up close, switches to wielding one-handed with an off-hand crossbow at distance.Wields: Murakumo (RH) and a Arbalest crossbow (LH).His armor can be found near Karla's cell, in Irithyll Dungeon, after he has been defeated.Alva will be hiding round a corner at the end of this pathway, guarding the Black Witch Set. From here, go to the left of the monument and the invasion will be triggered. If you keep going there will be a Ringed Knight.
Alva, Seeker of the Spurned is a NPC in Dark Souls 3.