For a new song to be heard, a character would need a reason to play it.
Therefore, only a third character needs to be given to each child of the family.
At the last minute it was decided that the characters needed to have some voice.
A good character doesn't need all that compassion - he can stand on his own.
Other characters - a lot of them - would need songs.
All that this character needed was a name to describe him properly and he had it.
When the other characters need to know something, they often go to him for sage advice.
In science fiction, the character need not be a human being.
But this character needs some growth and a new direction.
If a block is not full, additional characters need to be filled in.