Tonis is Heile's brother, a coal burner living alone in the woods. In Good Home you track him down so he can decide whether his sister stays with the Sanzhani.
Tonis is a woodcutter and coal burner who keeps to himself. His sister Heile lives with the Sanzhani, and the Tsarina won't let her go.
Search the ruined village of Oghasti and the coal burners' area, then follow the marked trees to his small camp.
He can accept that Heile is safe and let her stay, or take her home once you pay the Tsarina in Shiny Teeth. Push him the wrong way and he charges the burrow and dies.