The strong version of the Solus Control Unit. Only found in Siren's Call, and beating it unlocks Loader.

| In-game title | Friend of Vultures |
| Type | Special boss |
| Health | 2500 (+750 per level) |
| Base damage | 15 (+3 per level) |
| Armour | 30 |
| Where it spawns | Only in Siren's Call, stage 4. |
12 orbs in a fan that leave circles on the floor that slow and damage you for 6 s.
How to dodge it: It can kill you outright if several hit: move and avoid the circles.
Launches up to 3 Solus Probes, like the regular one.
How to dodge it: Break them as soon as they come out.
Three big blue circles that slow you and explode; meanwhile it gets a shield equal to its health for 6 s.
How to dodge it: Keep a movement skill to get out. While it is shielded, dodge instead of attacking.
A red (legendary) item next to the pillar where it appears, and the first time it unlocks Loader (Guidance Offline challenge).
A red (legendary) item next to the pillar where it appears, and the first time it unlocks Loader (Guidance Offline challenge).
Only in Siren's Call, stage 4.
2500 base health, plus 750 per enemy level. Armour: 30.
Sources: the Risk of Rain 2 wiki (each boss page and Module:Enemies/Data, read on 31 October 2026) and the game's own text. The explanations are our own. Icons: Risk of Rain 2 (Hopoo Games / Gearbox).