Make defend Higher..

[Deus Ex Machina]

Just in case you're talking about the amount of hits a certain character can take before caving in,
Hit them with a negative bdefend and the character's defense points will increase.

[3rdEnemy]

THis isn't still solved? Well if it isn't to add to Deus Ex Machina's post make the negative bdefend hit in the beginning of def and positive bdefend at the end so it can't be stacked...