Indomitable Spirit (Fighting Fit in Heroes II) is a recurring trait in the Dragon Quest series.
Appearances
Dragon Quest X
Making its main series debut, it is a Master Orb that is dropped by Corpse corporals, Trolls, Boss trolls, Great trolls, Squidzillas, Rhinocerexes, Pruslases, Dragstars, Scourgettes, and Drakularges, increasing the wielder's HP by 2 when equipped.
Dragon Quest Monsters: Joker 2 Professional
Making its debut, it is possessed by Night clubbers and Leokid, which increases their Tension by 1 level after 1 turn has passed after being stunned.
Dragon Quest Monsters: Terry's Wonderland 3D/SP
Dragon Quest Monsters 2: Iru and Luca's Marvelous Mysterious Key/SP
Dragon Quest Monsters: Super Light
Acting differently from the usual Monsters games, it is a characteristic of Restless Heart that always activates the first time a monster's HP drops to 1.
Dragon Quest Heroes II
Appearing as a Party Power in this spinoff, it increases the user's HP by 4.
Dragon Quest Monsters: Joker 3/Joker 3 Professional
Dragon Quest Tact
Already possessed by Psaro and Dhuran when they are recruited, it preserves their HP to 1 before it can hit 0, unless said attack and/or spell hits multiple times. It is also learned by Estark, Terry, Corvus's initial form, and Wulfspade ace via their Talent Blossoming.
Dragon Quest Smash/Grow
Appearing as a Blessing for The Gauntlet Season 2, it increases the player's Coup de Grâce gauge when hit by attacks.