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Osa, in Pikmin 4, is a civilian castaway that provides side missions related to building structures. Read on to find out who Osa is, what feature he unlocks, how to get him, and his side missions!
List of Contents

Osa is the 15th castaway you'll rescue in Pikmin 4. As you explore different caves, you'll find unconscious castaways to rescue. They will be unidentifiable when found, and their identity will be revealed after you end the day. You unlock characters in a specific order regardless of where you find the castaways.
Osa |
Research Task Force Recruit Home Planet: Siguray An archaelogist tracking the path of civilization across the universe. He hopes his discoveries will shock the world of academia. |
After curing Osa, you can interact with him at the Rescue Command Post. He will provide side missions related to building structures, along with rewards when accomplished.
| Side Missions | Objective and Reward |
|---|---|
| Building Goodwill 1 | Objective: Build 10 Structures Reward: 20 Raw Materials |
| Building Goodwill 2 | Objective: Build 20 Structures Reward: 20 Raw Materials |
| Building Goodwill 3 | Objective: Build All 43 Structures Reward: 50 Raw Materials |
| Side Missions | Objective and Reward |
|---|---|
| Precious Scientists | Objective: Rescue the 9 Researchers Reward: 50 Raw Materials |
Osa is one of the research team members you will need to rescue to complete the Precious Scientists side mission. This mission can be acquired by rescuing another member of the team, Chet.

| Hocotate Freight Employees | |
|---|---|
Captain Olimar |
Louie |
| Rescue Corps Officer | ||
|---|---|---|
Oatchi |
Shepherd |
Collin |
Russ |
Dingo |
Yonny |
Bernard |
- | - |
| Civilian Castaways | ||
|---|---|---|
Schnauz |
Dalmo |
Kingsly |
Francois |
Pitunia |
Puddle |
Mika |
Sy |
Dash |
Corgwin |
Jin |
Chet |
Sheeba |
Muggs |
Keesh |
Osa |
Frise |
Kaia |
Vonda |
Patch |
Chewy |
Twyla |
Don Bergman |
Bernise |
Yorke |
Horatio |
Nelle |
Molly |
Santi |
Kayz |
Kit |
Komo |
Alpin |
Chowder |
Lapi |
Sammy |
Wolfgang |
Ren |
Boris |
Grace |
Fawks |
Beaux |
How to Get Osa



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