Each character can have three logistics officers assigned to them.
Each logistics officer provides certain stats to the operative they are assigned to.
Each logistics officer is either an Intelligence, Medical, or Material officer (a.k.a. "Left", "Middle", "Right").
Each operative can have one of each of these.
Each orange-rarity logistics officer can be levelled up to Lvl.15, and purple-rarity officers up to Lvl.12. The higher the level of a logistics officer, the higher the stats they provide.
At Lvl.15, the stats provided are:
Intelligence - 50 DEF 100 ATK 20% Max HP Boost
Medical - 50 DEF 1,500 Max HP 20% ATK Boost
Material - 100 ATK 1,500 Max HP 20% DEF Boost
For a max level (Lvl.15) officer the percentage boost is always 20%, but the flat bonus can vary by a few points (e.g. 98 or 101 ATK instead of 100)
Each officer always gets the same stats (E.g. Cammellia [the Material Officer] of Couplet squad is always 101 ATK - every copy of Camellia is always 101 ATK.)
As such, you don't need to re-buy officers to get better stats, as the stats of a specific officer will always be the same for every copy.
Each logistics officer is part of a squad.
If an operative has 2 or 3 officers from the same squad equipped, then they get the 2/3 and 3/3 bonuses for that squad, respectively.
Each squad has its own distinct name (E.g. Couplet, Zephyr, Aileron, Vector, Lux, etc.) making it easy to figure out if two officers are part of the same squad.
These squad bonuses are usually both very strong, and also specific to a specific character.
Each new operative will have a squad introduced alongside them. Their designated squad will generally only buff that new operative, or will provide such specific buffs that no other operative gets much benefit from using them.
As such, each operative tends to have one logistics squad that provides them with much more performance than other squads, and you generally only want to use the operatives designated squad.
The logistics officers for the new operative can be bought in the event store during that new operatives release event, making it very easy to get them.
If you want to get specific logistics officers for an old character, go to (Fight -> Operation -> Mind Refinement).
You can use Presence in order to clear the mission to get the Elite Personnel Limit currency item.
You can use these to buy the logistics officers you want from (Shop -> Circulation -> Elite Logistics Officers)
Clearing Mind Refinement does also give you a random officer for a specific squad (shown in the bottom-left of the Mind Refinement interface).
Since which officer you get is random, this can take a lot of Presence to get a full squad via this alone.
Each clear gets you 20 points towards this track, so you need 5 clears (200 Presence/Stamina) per officer.
It is more efficient to just buy the officers from the event store during a characters initial release, and you are generally better off focusing on easily getting the logistics officers for the new character rather than inefficiently getting the logistics officers for older characters.
See each operatives specific page to see which squad they want.
(This is usually obvious from the squads buffs - characters are often explicitly mentioned by name. If not, the buffs are so specific it can't really be anybody else.)
Each logistics officer has three "Talents" - stats they provide to their equipping operative.
These stats are randomly determined upon acquiring the logistics officer, and are random every time - if you buy multiple copies of a specific logistics officer, then each one will have different talents, randomly determined each time.
The first two talents are "Basic" talents.
The third is the "Special" talent.
One Basic talent can be re-rolled using the "Revision Limit" currency - re-rolling one basic talent locks the other basic talent such that it can never be altered.
The Special talent can be re-rolled using the "Revision Application" currency.
Ideally, you want your logistics officers to have three perfect talents, however since you can only re-roll two of them (the special and one basic), this means that not every logistics officer can be made perfect.
Instead, a logistics officer can only be upgraded to have three perfect stats if they already have one basic talent be perfect upon purchase.
If a logistics officer has one perfect basic talent, then you can re-roll the other basic talent, locking the perfect one, and then re-roll the other basic talent as well as the special talents to perfect, thus getting a perfect logistics officer.
It is thus recommended that you buy logistics officers for new characters until you get one that has a perfect basic talent, as then they will be able to become perfect.
Experienced players often use a very large percentage of their event currency buying logistics officers in order to get one that has a perfect basic talent.
If a logistics officer doesn't have a perfect basic talent, then do not waste any resources on re-rolling them - they can never become perfect, and hence you will eventually replace them with a better (perfect) officer, so don't bother re-rolling any logistics officer unless they already have one perfect basic talent, and can thus become perfect.
Re-rolling a talent is simply a random roll - you can choose to keep the existing roll or swap to the new random roll.
If you do enough normal re-rolls, you can get a Targeted re-roll. This limits the re-roll to only one specific stat.
The sheer number of possible rolls means that getting a perfect re-roll is extremely unlikely, and even Targeted re-rolls are still unlikely to be perfect.
As of launching this website, the total number of Logistics Officers I had managed to upgrade to be literally perfect was 1.
Don't worry about getting them literally perfect - You might get lucky once or twice, but getting lots of logistics officers to perfect is a fools errand.
Instead, getting lots of logistics officers to good rolls is a much better use of resources than trying to get 1 perfect.
Possible Talents
Basic Talents Min Max
Max HP 4.0% 5.5% 7.0% 8.5% 10.0%
ATK 4.0% 5.5% 7.0% 8.5% 10.0%
DEF 4.0% 5.5% 7.0% 8.5% 10.0%
Crit DMG Amplifier 4.2% 5.8% 7.4% 9.0% 10.6% This buffs the extra damage added by crits, not the whole damage of a critical hit.
Shooting Crit Rate 2.1% 2.9% 3.7% 4.5% 5.3% Note that literally no operative in the game wants this as their optimal stat.
Skill Haste 7.7 10.6 13.5 16.4 19.3
Alignment Index 42.4 58.3 74.2 90.1 106
S-Energy Recovery Bonus 5.6% 7.8% 9.9% 12.0% 14.1%
U-Energy Recovery 5.6% 7.8% 9.9% 12.0% 14.1%
Special Talents
Kinetic DMG 3.4% 4.7% 5.9% 7.2% 8.5%
Thermal DMG 3.4% 4.7% 5.9% 7.2% 8.5%
Frost DMG 3.4% 4.7% 5.9% 7.2% 8.5%
Electrical DMG 3.4% 4.7% 5.9% 7.2% 8.5%
Chaos DMG 3.4% 4.7% 5.9% 7.2% 8.5%
Healing Bonus 4.2% 5.8% 7.4% 9.0% 10.6% Note that this means healing applied, not healing received.
Auxiliary Units Strength 4.2% 5.8% 7.4% 9.0% 10.6% The only operative in the game that wants Aux Unit Strength is Mauxir - Lotus.
Shield Construction Efficiency 4.2% 5.8% 7.4% 9.0% 10.6% Note that literally no operative in the game wants this as their optimal stat.