The four-star demorgorg understood their plight so he just smiled and didn't rush them to stand.
The tree father was watching them while inspecting the data he was receiving from their runes. He is of the opinion that while the initiation process is difficult and will need some getting used to, it is great for the giants of orders. It is still great even though 2 initiates didn't survive the process.
These two died. They are different from the other 3 who failed because their demons died or the 3 who failed because they couldn't hold still during the tattooing. They can start again with other demons after a period of rest and training but these 2 can't.
The burden was too big for their existence. Their bodies broke apart as their consciousness crumbled. They died and scattered to ashes leaving behind a ball formed by the chains binding a demon tightly.