In Ys Origin, do the equipable trinkets (the ones that go in the fourth equip slot) have any effect in boss fights? I've noticed that, for example, the healing cape probably does not, or at least you can't afford to stand still for so long, but the revive trinket does work. But for example in Ys I the rings you can equip don't ever have any effect in boss fights.
For Yunica and Hugo, it wouldn't make much of difference, but the third character has the Cleria ring, which grants +3 attack and -3 defence. Are these bonuses in effect in boss fights or not?