What is the purpose of the prayer in Fire Force? I'm not too far in the series but I can't see any use in the prayer yet.
First I thought the prayer either weakened the infernal or boosted the firefighter.
Then I thought the soul needed the prayer to be &quot;freed&quot;.
For example, on D.Gray-Man:

 A soul can either be freed when killed by exorcist innocence or destroyed when killed using a different method.

Does it make a difference if they pray or not in Fire Force?
Great pressure is pressed on people if they feel they are killing people (or at least I think so). The Fire Force was set up to save people instead of killing, although they may be literally killing all the time.
In order to maintain a sense of justice and mercy, prayers are needed, not only to confort the family and relatives of the dead, but to ease the feeling of guilt of the firefighters.