Helvia was Brencis's human wife in ancient Rome. You only see her through Isbrand's memories, but her death explains a lot about the cold Knyaz Brencis became.
Helvia was a Roman citizen married to Brencis, then a commander named Caeso. After he was turned, she was told he had died fighting and mourned him.
When the turned Brencis came for her, Helvia called him a demon and set herself and her villa on fire rather than be taken. Isbrand made Brencis watch to teach him to let go of human feelings.
The memories show a loving wife who feared what her husband had become but faced a painful death without flinching.
Albertus Taurinus
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.
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.