|Appears in||Mother 3|
|Nom de guerre||Barrier Man, Barrier Dude, Barrier Gal|
|Vulnerable to||PK Thunder, PK Freeze, PK Fire|
The Barrier Trio is a boss in Mother 3. They were created by the Magypsy Mixolydia to guard the Tanetane Island Needle. Inscribed on their chests are their names, "Barrier Man", "Barrier Dude", and "Barrier Gal". Their battle theme is Strong One.
In battle, they have two formations. On their first turn, they get into "Barrier Formation". This is where they will start using powerful PSI, including all offensive PSI (except PK Flash and PK Love). At this point, Boney can utilize his sniff ability to find the Trio's weakness; the weakness changes every time they get into Barrier Formation, depending which of the three call out. If the Barrier Man calls out, their weakness will be fire, the Barrier Gal will change their weakness to ice, and the Barrier Dude will change it to thunder. After a few turns, they go back to the default formation.
When their HP gets low, they will concentrate, signaling that they will use PSI Starstorm on the next turn. The signal for their defeat is when they concentrate again, but don't have enough strength left to do another PSI Starstorm. Once their HP is completely depleted, the exhausted trio will then perform a Barrier Formation with the last of their strength, which the game will describe as "spectacular".
- It is the first enemy encountered in the game that has the ability to use PSI Starstorm.
- They might be a reference to the Pillar Men, from Jojo's Bizarre Adventure: Battle Tendency. There are 3 of them, they're made of stone and come to life, are probably older than human civilization, and they have a tendency to strike very passive and suggestive fighting poses.