Certain characters can achieve support rank S with each other, allowing them to marry and have children.

Marriage and Child Units

When a pair of characters reach support rank S with each other, they will get married. If they are of the opposite gender and can have a child, a Paralogue chapter will become available after they marry. If you successfully complete the Paralogue battle, you will recruit the couple's child as a unit to fight with your army. You can play the Paralogue by choosing Next Battle from the castle menu, then choosing a Paralogue.

Corrin can achieve support rank S with any character of the opposite gender. Additionally, male Corrin can marry Niles, and female Corrin can marry Rhajat.

Children

Female Corrin and Azura each have the ability to have two children. Male Corrin can only have two children if he marries Azura. All other units can have one child each.

If female Corrin marries Rhajat, you will not be able to recruit Kana. If male Corrin marries Niles, you will not be able to recruit Kana or Nina. Other than that, there are no pairings that prevent you from recruiting any children.

In Birthright and Conquest, you can recruit up to 13 child units. In Revelation, you can recruit all 21 child units.

Children Hair Color

Children will have their mother's hair color, with the exception of male Kana, who will have his father's hair color.

List of Children

The following is a list of all child units that can be recruited, and the parents who must marry in order to result in those children.