|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.
Before starting the fight it's a good idea to give most of your recovery items to Duster and Boney, but give a couple of secret herbs and maybe a cup of life noodles to Lucas And/Or Kumatora just in case. Duster and Boney will not be very useful offensively because of the Trio's high defence. Duster and Boney will mainly function as item healers, and attack item users. Kumatora, being the only one with elemental PSI will be your main damage dealer, and Lucas will be your PSI healer as well as being able to do decent physical damge when the Trio is not in a formation.
A stable strategy to try during the first turn before they enter a Barrier Formation, is to have Lucas start casting PSI Counter on everyone, starting wth himself. This will create a possibility that some of the damage they direct towards you, as they will only ever attack with PSI, will hit them as well. Also have Duster use the tickle stick to lower their defence, although physical attacks will not be useful throughout the fight, it will give you a free turn where in they'll be busy casting Defence Up Omega. Use this time to continue applying PSI Counter if you haven't already given it to everyone else.
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.