Eygon is first encountered guarding the cell where Irina is being held. He has an initially negative disposition toward the Ashen One but agrees to ally himself with the Ashen One after Irina is freed from her cell. He makes it clear that the alliance is only valid for as long as Irina is kept safe and warns them that he will make them pay if her safety is at risk. He can then be summoned for the Crystal Sage fight.
If the player kills Irina, Eygon will be waiting for them in the area outside of Firelink Shrine and immediately become hostile. If any darkmiracles are purchased from Irina after giving her a forbidden tome, he will kidnap her to "save" her from corruption and become hostile outside Firelink.
"Hmm... Another one of those Unkindled, are you? All you faceless Undead, behaving as if you deserve respect. Hmph. No matter. Heed my words. If you’ve any sense, you’ll go find a coffin to huddle up inside. You here, in this land of Hollows, you’re like a frail maiden on the front lines. If like the others, you’re fool enough to play the champion… Then go on ahead, traipse right past the abandoned church. You’ll face death, and it won’t be pretty. Enough death to leave you broken, time after time."
Talking after his introduction
"If like the others, you're fool enough to play the champion... Then go on ahead, traipse right past the abandoned church. Hopeless, the whole lot of you. Like little moths, flittering towards a flame."
Talking after visiting Irina's cell
"You like poking around in cells, do you? How very genteel!"'''"Ah-hah, taken an interest in her, have you? Well she's a lost cause. Couldn't even become a Fire Keeper. After I brought her all this way, and got her all ready. She's beyond repair, I tell you."
"The woman's a lost cause. Couldn't even become a Fire Keeper. She's beyond repair I tell you."
After rescuing Irina
"You've gone and rescued her, have you? How very quaint, pitying creatures that are beyond help. Very well. I'm sick of looking after her at any rate. I am Eygon, a knight of Carim. I am allied to you as long as you assure the girl's safety. And only for that long..."'
"What's the matter? My terms are very simple. I am allied to you for as long as you assure the girl's safety. And only for that long..."
Introduction if you visit Irina's cell before speaking to him
"Hmm... Another one of those Unkindled, are you? All you faceless Undead, behaving as if you deserve respect. Now you're poking around in peoples' cells. How very noble!"
Introduction is you rescue Irina before speaking to him
"Hmm... Another one of those Unkindled, are you? All you faceless Undead, behaving as if you deserve respect. Now you've gone and rescued the wench... How very quaint, pitying creatures that are beyond help."
Speaking to him at Firelink after defeating the Abyss Watchers
"Ahh, I know you. Been some time. I just dropped in to see how she's getting on. Now, what are you playing at with this circus? This cesspool of doddering oldfolk and degenerates. Couldn't be better. She must fit in perfectly here."
Once he takes Irina away
"I made myself very clear. My allegiance remained only as long as you assured the girl's safety. This knight of Carim does not forgive betrayal. Even a broken woman deserves her dignity..."
When the player dies during the ordeal
"Remember. A knight of Carim does not forgive betrayal. Not ever."
When he dies during the ordeal
"Irina... This bastard/wench..."
"What is it now?"
"Curse you, damn fool!"
When he becomes aggressive
"Lost it, have you? Then I'll take care of you. As many times as it takes!"
Eygon is similar to Garl Vinland from Demon's Souls, wielding a similar shaped weapon and being tasked with protecting a holy maiden. Although Eygon appears to dislike his task compared to Garl, who was completely devoted to Astraea.
Eygon uses a shield, a rare trait for Knights of Carim.