Horatio's wife and older child, who survived their crawl and took deals at the tenth floor's end.
Horatio had a wife and an older child. Both survived the dungeon and had already taken deals at the end of the tenth floor. Horatio himself held on past that point, hoping to negotiate something better — to make a life for them when they were finally all out.
They are the reason Tipid's choice haunts him. Tipid had nobody; he was alone in the world and in the universe, and he still used the single charge of Tipid's Key on himself. Everybody told him it was okay to be selfish when saving yourself. He has never accepted it, and he throws the key away rather than keep the thing he served an extra season to earn.
The family waiting outside for a man Tipid left behind — the weight behind his guilt.