Siorus

Odhran: "Heh, you just gotta go with Brother Llewelyn's weirdness."
Siorus: "Hmph!"

Alastar: "Heathens have infected this very place, Siorus. You know that as much as I."

New dude! This guy's name is Siorus, and he's one of the more conservative monks in Lindisfarne. As an apprentice, he was known to be quite a grump, disliking Llewelyn's unconventional teachings and his lessons, being taught by way of riddles and laughing towards the sky. Years later, when Odhrán came back from Iceland, he came back with Alastar, the newcomer from a militia that got attacked by Vikings. Alastar, being conservative himself, was appalled by how liberal the monastery ran, and swore to himself to become the abbot. Siorus, seeing the opportunity to see Lindisfarne ran in an orderly fashion, aided Alastar rise to power, even if it meant taking things to the extreme. As time went by however, Alastar became more and more extreme, and Siorus became more reasonable among the liberal leaning monks. The night Alastar raided Colby's home village sealed his fate, as Siorus became overwhelmed by the guilt of hurting innocent people. Siorus prayed for forgiveness in the chapel, until he was caught by Alastar himself. The two began an argument on how guilt over the "enemies of God" was worthless, then Siorus outright questioned Alastar's position as abbot. It led to a full physical fight, and sadly, Siorus didn't make it. No one was watching or eavesdropping, except for Rinan, who knew Alastar was bad news in the first place.

The Secret of Kells (c) Tomm Moore