Combination bonus
In Fire Emblem: Genealogy of the Holy War, a combination bonus is a statistical bonus awarded to a pair of units who are lovers or siblings. When an eligible pair of units stand next to each other on the battlefield, both gain a +20% chance of executing a critical hit. A combination bonus is the only way for a unit who does not possess the Critical skill, either as their own skill or through their weapon's kill bonus, to execute a critical hit; if they already do possess the skill, the +20% bonus is added to their pre-existing critical hit rate. If a combination bonus critical activates, a brief animation indicating this will play before the battle commences (pictured).
Combination bonuses do not explicitly exist in later Fire Emblem series games, with their function incorporated into the support/bond bonus systems.
Calculations
Critical hit rate
| Game | Formula | Notes |
|---|---|---|
| Genealogy of the Holy War Critical rate (without Critical) |
(Combination bonus)% | +20% critical hit rate when the combination bonus is in effect. |
| Genealogy of the Holy War Critical rate (with Critical) |
Skill + (Kill bonus - 50) + (Combination bonus)% | +20% critical hit rate when the combination bonus is in effect. A kill bonus of 50 awards the weapon's wielder Critical, and every kill bonus point above 50 awards +1 to the critical rate. |
Sibling pairs
The following pairs of characters are siblings and can thus activate combination bonuses:
- Sigurd and Ethlyn
- Edain and Brigid
- Leif and Altena
- Larcei/Creidne and Scáthach/Dalvin
- Lana/Muirne and Lester/Deimne
- Diarmuid/Tristan and Nanna/Jeanne
- Fee/Hermina and Ced/Hawk
- Arthur/Amid and Tine/Linda
- Patty/Daisy and Febail/Asaello
- Lene/Laylea and Coirpre/Charlot
Though half-siblings as part of the game's story, Seliph and Julia are not counted as siblings for the purpose of the combination bonus.
