If a character enters Lucky 7s they will always have 1 HP after the battle. That's just how it is.

Quote Originally Posted by shinangel2292
I'm not sure how many attacks with 7777HP are executed once your character is reduced to 7777HP health, but it's a lot
One character enters Lucky 7s = 62 attacks
Two characters enters Lucky 7s simultaneously = 63 attacks shared between two characters
Three character enters Lucky 7s simultaneously = 64 attacks shared between three characters
Each attack deals 7,777 damage.