Building bonds between units.
Each unit has a list of other compatible units that they can build support with. Once a pair of units have built enough support with each other, they will unlock a support conversation that can be initiated in battle by choosing the "Support" command when adjacent to each other. Building support between units gives the player some nice insight into each unit's personality and backstory, while also providing bonuses in combat.
Calculate what bonuses you get and how long it will take to happen.
How to make your units like each other.
Support Point Thresholds
The support points between units is maintained internally by the game. Once two units reach a certain threshold of point, they will unlock a support conversation by using the "Support" command when adjacent to each other. No additional support points can be gained until the conversation has been viewed. The following table lists the point thresholds for each support level.
|Support Level||Total Points||Delta|
How to Build Support
To build support between two units, simply place them adjacent to each other by the end of the turn. Each unit pair (that can support with each other) has a hidden value for how many support points they will gain for each turn that they end next to each other. To go along with this, each pair of units also has a base support point value, which is how many points they have the moment both units are on your team.
For example, Roy and Lilina have 56 base points, with a gain of 4 points per turn. Hence, once you reach Chapter 8 (where Lilina joins), Roy and Lilina only have to end one turn next to each other to gain the C support. The slowest building supports have a base value of 1 and a gain of 1 per turn, requiring 59 adjacent turns to even reach a C support. An example of this is Roy and Shanna.
Each unit can have up to 5 support conversations, and you can only gain 120 support points across all unit pairs per chapter. Since every map in FE6 is a seize map, you can easily (albeit tediously) rout the map and repeatedly end turns with your desired pairings next to each other until all 120 points have been used (assuming you don't care about your tactics rank).
Units that like each other fight better when together.
Any two units that have at least a C support will gain support combat bonuses when they are within 3 or less tiles of each other. These bonuses will stack additively when there are multiple support partners within range, and apply during both player phase and enemy phase.
The bonuses given to each unit pair depends on their affinities and support level. Each affinity has set bonuses for each support level. Units with support between them will gain the bonuses for both affinities, for example if Roy (Fire) and Lilina (Light) have attained a C support and are within 3 tiles of each other, they will each gain 1 Atk, 0.5 Def, 5 Hit, 2.5 Avo, 5 Crit, 0 Crit Avo during combat. Any bonus decimals are rounded down. The following table lists the bonuses at each level for all affinities.