Silque is a sweet-tempered wandering cleric in Mila's service. When Silque was young, he and his mother, a priestess of the Duma Faithful, went on a pilgrimage in Rigel. He was a sole son and never met his father. Suddenly one day, his mother left him in a priory in Zofia, before vanishing without a trace. He was raised as an orphan at the priory. It was Mila's temple that sheltered and saved her; thereafter, he made it his lifelong goal to share Mila’s teachings with those suffering from loneliness.

Before the start of Shadows of Valentia, Silque leaves Novis Island to deliver Mila's Turnwheel to Alm. However, he is attacked by brigands twice on the way to Ram Village; Jesse saves him the first time, but he falls unconscious during the second and is kidnapped by the thieves. When Alm hears of this, he immediately rushes to the Thieves' Hideout to rescue her. After defeating the bandits, he wakes up and tells the party who he is.

If Alm rescues her, he hands him Mila's Turnwheel and explains how it works to him. However, if Alm skips the Thieves' Hideout completely and never interacts with her, he instead receives it from a merchant at the beginning of Act 3, who informs Alm that he received it from Silque.

If Silque is not recruited into Alm's party, Celica can visit him in the same location in Act 2, revealing that the two know each other. However, Silque will not join Celica's party in spite of that. After the war, he heads to Rigel to heal the wounded.