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Combination bonus

From Fire Emblem Wiki, your source on Fire Emblem information. By fans, for fans.
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A combination bonus is a game mechanic in which a statistical bonus is awarded to a pair of units who are lovers or siblings.

Leif and Nanna activate a lover combination bonus.

Overview

The mechanic first appeared in Fire Emblem Gaiden and was exclusive to Alm and Celica. During the final battle either character could get a guaranteed Critical Hit if attacking when standing adjacent to one another.

The mechanic appeared again in Fire Emblem: Genealogy of the Holy War in a more expansive form. 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 in Fire Emblem: Genealogy of the Holy War:

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.

See also

Game mechanics
Out-of-battle management Base (BarracksBase CampBase conversationEveryone's ConditionsExpeditionGarreg Mach Monastery (Abyss) • My CastleSomniel) • Bonus experienceDungeonsGameplay modes (DifficultyCreature CampaignNew Game +) • GoldLessonsMila ShrinesPeddlerPreparationsRenownShopping (ArmoryBargainsForgeItem shopMerchantOnline shopSecret shop) • Supply convoyWorld map
Battles and chapters ArenaBattle saveBossCastleChapter (Alternate routeParalogueSide quest) • ChestCombat forecastEvent tilesHidden treasureObjectivesReinforcementSkirmishTerrain (Hazards) • Turn (Turn rewind) • Weather (Fog of war) • Village
Stats Units ActionAffinityAuthorityBiorhythmCharmClass (Class masteryClass relative powerUnit type) • Constitution (Aid) • DefenseExperienceFollow-up critical multiplierGrowth rateHit pointHoly BloodInventoryLevelLuckMagicMovementProficiencyResistanceSkillSpeedStrengthWeapon levelWeight
Weapons Brave weaponCritical rateDurabilityHitKill bonusMightPersonal weaponsRangeWeapon experienceWeapon levelWeightWorth
Unit mechanics and commands AdjutantAttack (Counterattack) • Auto-BattleBattalion (Gambit) • CantoChain attackChain GuardClass change (Reclass) • Combat artCrestsDance (GaldrarPlaySing) • Death (Decoy) • DismountDragon VeinEmblem RingsFatigueInventoryLaguz transformationLove (JealousyInheritance) • Pair UpRallyRecruitmentRescue (Capture) • Skills (Offensive skill) • SmashStaggering BlowStatus effectsSupportTalkTradeUnit (AvatarBond unitsBonus unitEinherjarLoan unitPrisonerReplacement unitSubstitute character) • Visit
Calculations AttackAttack speedAvoidBonus damageCritical hit (Combination bonusDodgeTriangle Attack) • Hit rate (True hit) • Random number generatorWeapon triangle (Trinity of magic)
Connectivity amiiboData transferDouble DuelDownloadable contentLink ArenaMultiplayer battleOnline shopSpotPassStreetPass
Other BarrierBirthdayClass rollGlitchesMultiple endingsRankingsSound RoomTactician bonus