Operator Favorability Mechanics
A systematic walkthrough of operator favorability in Arknights: Endfield — piecewise tier-to-percent conversion, passive accumulation rate at the Control Nexus, work/rest cycle, gift-efficiency decay, and a quick-reference cheat sheet to help you plan deployments and favor-leveling routes efficiently. This guide is based on community comparison tests across multiple operators on end.wiki. Mechanics may change with version updates — feedback and corrections are welcome.
Concepts
- Favorability points (fav) — the internal value tracking how much an operator trusts you, accumulated from 0.
- Favorability percentage — the % shown in the game UI. fav is mapped to % via a piecewise-linear formula.
Below, “fav” refers to the internal value and “%” refers to the displayed percentage.
Relation Levels
The game shows favorability only as a percentage, with each tier spanning 100% (max 200% at Trust). The conversion is piecewise linear: inside Friendly, every 1% needs 3 favorability points; inside Close, every 1% needs 12 points — Close progresses roughly 4× slower than Friendly.
The values in this table are based on end.wiki community testing and inference; 100% accuracy cannot yet be confirmed. If you notice a discrepancy with the in-game display, please submit data via the page's feedback entry to help us calibrate.
| Level | Favorability % | Favorability value | Description |
|---|---|---|---|
| Lv. 1 | 0% – 99% | 0 – 299 | Friendly |
| Lv. 2 | 100% – 199% | 300 – 1,499 | Close |
| Lv. 3 | 200% | ≥ 1,500 | Trusting |
What Favorability Unlocks
- Better return gifts — at higher tiers, operators send back rarer or more valuable items.
- Favorability stat nodes — certain nodes on an operator's stat board require a specific favorability threshold; unlocking them grants permanent stat bonuses.
- Operator voice lines — higher tiers unlock new dialogue and interaction voice lines.
Passive Accumulation: Stationed in the Control Nexus
Assign an operator to the Control Nexus. While they are in the “Working” state, they automatically gain +1 fav every 30 minutes. Accumulation continues even when you are offline or not in the Dijiang scene.
Only the Control Nexus assignment grants passive favorability. Other rooms (MFG Cabin, Growth Chamber, Reception Room, etc.) do not generate favor.
Rate Conversion
2 fav per hour (= +1 fav every 30 minutes)
Time to gain the next 1%
| Level | fav per 1% | Time required |
|---|---|---|
| Lv. 1 | 3 fav | 1.5 hours |
| Lv. 2 | 12 fav | 6 hours |
First-time assignment has a 1-hour delay
After a fresh assignment, the operator gains +1 fav at exactly 1 hour (the first tick is delayed). After that the cadence returns to normal: +1 fav every 30 minutes. So reaching the next 1% takes about 2 hours from the moment of assignment.
If an operator resumes from a rest state, the restart delay is short — typically a few minutes — and accumulation resumes.
Work / Rest Cycle
Operators have a stamina cycle: at full stamina they work for about 14 hours; once depleted, they leave the room and rest for about 8 hours, then resume work automatically when stamina is full.
Without buffs, stamina recovers at 12% per hour — about 8.3 hours from empty to full. Some operators provide recovery-rate bonuses.
How much favorability does one full work cycle add?
- First cycle of a freshly assigned operator: roughly 0% → 9% (about +27 fav).
- Each subsequent full cycle (~22 hours): about +9% in Lv.1, about +2.25% in Lv.2.
Once in Lv.2 (Close), passive accumulation slows dramatically. Going from 100% to Trusting (200%) on idle alone takes dozens of days.
Offline cap: when you're offline for several days, passive accumulation tops out at 200 fav (reached in about 4–5 days). Regular play almost never hits this cap.
Gift Mechanics
Gift effect
- Preferred gift (matches the operator's tags): +20 fav per item.
- Non-preferred gift: +2 fav per item.
Non-preferred gifts are only 1/10 as efficient as preferred ones — prioritize preferred gifts whenever possible.
Gift Favorability Multiplier
Gift favor gain to the same operator decays by tier: before the first cap is reached, gifts count at 100%; beyond it, the multiplier drops to the next tier. Resets on daily refresh.
| # | Multiplier | Daily Favor Cap |
|---|---|---|
| 1 | 100% | 60 |
| 2 | 50% | 90 |
| 3 | 25% | 105 |
Actual gain per gift
| Daily cumulative range | Preferred gift | Non-preferred |
|---|---|---|
| 0 – 60 fav | +20 / item | +2 / item |
| 61 – 90 fav | +10 / item | +1 / item |
| 91 – 105 fav | +5 / item | ~0 / item |
Key Numbers Cheat Sheet
| Metric | Value |
|---|---|
| Passive accumulation rate (Control Nexus, working) | 2 fav / hour |
| Lv.1 — fav per 1% | 3 fav / 1.5 hours |
| Lv.2 — fav per 1% | 12 fav / 6 hours |
| First +1 fav after a fresh assignment | 1 hour after assignment |
| Full work cycle | ≈ 14 hours |
| Stamina recovery rate (no buff) | 12% / hour |
| Daily gift fav cap | 105 fav |
| Offline accumulation cap | 200 fav |
| Trust (Lv.3) threshold | 200% / 1500 fav |