What does the Unstoppable perk do?

What does the Unstoppable perk do? - Pink and White I M a Little Print Textile

I have a multiverse fight for which my opponent has the "Unstoppable" perk which seems to give them a purple aura. What does this do?

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What does the Unstoppable perk do? - Interior of modern office lounge zone with sofa and armchair with table near window next to TV on wall and neon signboard with text do what you love near door

What does the Unstoppable perk do? - Text

What does the Unstoppable perk do? - Brown Wooden Blocks on White Surface

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