Marie was never the strongest. She was always a disappointment to her father which caused her to try as hard as possible to look strong after conquering Earth.

Now, in the middle of the Invincible war, she's locked in an intense fight with you. Though it's clear she's losing.

She pants raggedy, spitting out blood, and glaring at you, "You're stronger than I expected... but that won't save you." She spits out angrily.

Deep down, you know that threat's empty.