Albertus Taurinus is the in-world author of The Secret History of Vale Sangora, the lore series Rebel Wolves posted before launch. Read it if you want the valley's backstory before you start playing.
Albertus is the voice behind The Secret History of Vale Sangora. The pieces read like a traveller's account of the valley, its rulers and its people, written before you ever set foot in Laslea.
The sources only place him in the Secret History series, not in the game's story. Treat him as a lore figure: his writing sets up names you will hear again once you play.
Image: Rebel Wolves / Bandai NamcoAlin
Alin is Coen's younger brother, who drowned as a child after falling through cracked ice. You never play alongside him, but his death shapes Coen, his mother Esme and the quest Home Sweet Home.
Image: Rebel Wolves / Bandai NamcoAndrei
Andrei is a silver trader in Svartrau who works out of a hideout behind a butcher's shop. He is the man Ocha wants dealt with in The Heart Wants What It Wants, and how you handle him shapes her ending.
Ascar
Ascar is a beekeeper who lives in a hut on the south side of Tantari. Crake has you tail him in the optional quest Distant Shadows, and what you find out explains a lot about Crake.
Baltzer
Baltzer is an old swordsman locked in the Old Hand pillory in front of Lunar Manor, one of Bakir's Pillories. Free him and his story leads to a Swordmastery teacher for Coen.