Initial Endurance

Initial Endurance is the second skill in 's Confidence skill branch. It grants a 50% chance that a successful battle start affinity will buff the party with 20% for 30 seconds.

Overview
Being a 50/50 chance of activating, it's not a terrible idea to keep flipping the coin until it works, and only then go in. 30 seconds is probably enough to cover most of a fight with enemies in the field, but bosses will take longer and so it'll expire early.