Once Human Butterfly's Emissary Guide

The Butterfly’s Emissary is a B-grade Combat Deviation in Once Human introduced through the Territory Defense tutorial. Unlike most Combat Deviations that appear as random overworld bubbles, the Butterfly’s Emissary is guaranteed during the tutorial sequence — making it the first Deviant most players secure. This guide covers capture location, ability details, mood mechanics, and why it remains relevant in nightmare PvE loadouts.

Overview

“A tiny paper butterfly, glowing with a rosy hue. The butterfly will guide you when you’re lost, comfort you when you’re in tears, and protect you when you’re in danger. The one who folded the butterfly can’t be with you just now, but this butterfly can be with you in her place.”

Butterfly’s Emissary is a Combat Deviation, meaning it synchronizes with your Meta to grant active abilities in battle. It occupies a Securement slot and travels with you during Prime War, silo runs, and exploration.

Best place to farm Butterfly's Emissary | Once Human

How to capture

The Butterfly’s Emissary is obtained during the Territory Defense tutorial questline:

1. Follow the main quest until you reach the Territory Defense tutorial
2. When prompted, use the Deviation Capture option on the glowing butterfly that appears
3. Press F when targeting the gloves to attempt capture
4. Place the secured Butterfly’s Emissary in an Isolated Securement Unit
5. Synchronize it with your Meta to unlock its combat abilities

This is not a random encounter — every player who completes the tutorial gets one guaranteed opportunity to capture it.

Abilities

Butterfly’s Emissary provides the following when synchronized:

• Battle Skill — contributes to combat rotation with short-cooldown utility
• Weak-spot enhancement — Butterfly’s Emissary abilities have been noted in nightmare SN700 showcases for improving weak-spot uptime
• Protective behavior — lore describes guidance and protection; in practice this translates to targeting assistance and flanking behavior

The specific ability names and exact mechanics follow the Version 2.2.4 Combat Deviation system outlined in the Combat Deviations guide.

Farming for better variants

If you want to capture additional Butterfly’s Emissary copies (for fusion or to find a stronger variant with better trait rolls):

• Location scouting — the butterfly appears in specific areas of the starting zone during the tutorial only
• Respawn mechanics — once captured during tutorial, wild respawns are not reliable for farming
• Deviation Fusion — the 24 September 2026 update will allow trait remixing through the Fusion Pod, letting you improve an existing Butterfly’s Emissary rather than finding a perfect wild copy

Mood and power

Like all Deviations, Butterfly’s Emissary has a mood system that affects its performance:

• High mood — full ability effectiveness, active combat participation
• Low mood — reduced effectiveness, passive behavior
• Mood recovery — interact with your Deviant at the Securement Unit, use high-quality food, or wait for passive recovery over time

Keep Butterfly’s Emissary’s mood high before difficult content. Low mood is a common reason players dismiss the Deviant as ineffective when it is actually a mood problem, not a capability problem.

Scenario performance

Deviation: SCP — Butterfly’s Emissary gains importance here since combat pets are primary damage sources. Its abilities supplement the pet-as-weapon loadout effectively.

Manibus and general PvE — supplemental combat utility. It is not a primary damage dealer but provides meaningful backup in content where Festering Gel’s heal is not enough.

PvP scenarios — abilities may be limited per the Combat Deviation scenario rules. Check the specific scenario before relying on it in Evolution’s Call or Prismverse.

How to raise mood and power

• Feed it regularly — Deviants respond to player attention; visit your Securement Unit between sessions
• Use quality ingredients — cooking with the Chef class produces better Deviant food
• Avoid long periods of neglect — Deviants that go untouched for full seasonal cycles may have permanently lower mood ceiling
• Consider Beastmaster class — the class-specific mood bonuses help keep combat pets in peak condition

Placement in tier list

The Butterfly’s Emissary sits in A-tier of the Deviant tier list for Combat Deviations. It is not S-tier (Festering Gel still holds that for universal solo and group viability), but it earns its Securement slot through:

• Guaranteed accessibility (every player gets one)
• Consistent weak-spot contribution in boss showcases
• Low maintenance compared to rarer Combat Deviants that require specific capture conditions

FAQ

Is Butterfly’s Emissary good? Yes. It is a solid A-tier Combat Deviation. The guaranteed capture during tutorial means every player has access to a useful combat pet without hunting specific spawns. It performs well in nightmare content when mood is maintained.

Can I get a better version after the tutorial? Wild respawns are unreliable after the initial tutorial capture. Deviation Fusion (24 September 2026) will let you remix traits on your existing copy to hunt for better rolls.

Does it need to be synchronized? Yes. Like all Combat Deviations, synchronization with your Meta unlocks its Battle Skill and Ultimate abilities. Without synchronization, it provides minimal combat contribution.

Can I use it in Deviation: SCP? Yes. Butterfly’s Emissary works in Deviation: SCP. Combat pets are primary damage in that scenario, so a well-maintained Butterfly’s Emissary contributes meaningfully to your loadout.