A few minutes earlier one of the youngsters had asked who that was. They had several questions about his death. How he was killed. Why he was killed. Not in the way we think, but they do rest.
Angels are a pool of energy.
If they have so much energy they should not have to sleep. Maybe it is because I have been religious instead of being spiritual. Prayer gives us hope. If we have a really bad day prayer can give us the strength to go on. Prayer forms a habit.