|Note: This is listed as 'High Investment' but all skills can be inherited from 4★ units.
Very much a budget build. With her mostly middling offensive stats, Robin's best role is that of a supporter who buffs her teammates into nukes. Assuming conditions are right, this build will result in a total stacking of Atk+7/Spd+7/Def+4/Res+4 in combat for any ally within two spaces of her. The caveat to this is that it must be a mixed team; the boost from Tactical Gale's refine only applies when there are no more than two of any move type on the team. It's essentially a +4 Tactic to all stats.
As an Assist, Draw Back can help her drag her allies out of danger without leaving herself in the line of fire; while Reposition also moves allies, it could leave her open to a melee attack.
When Robin does enter combat herself, Triangle Adept 3 gives her an extra and much-needed boost when she goes up against blue and colourless foes. Quick Riposte 2 will help mitigate her unimpressive speed when on the defense; obviously Quick Riposte 3 is the overall better option, but it does require the sacrifice of a 5★ Hero (though not necessarily a 5★ exclusive Hero).
Her native Ignis will work fine as a Special, and some may prefer the increased damage output given her lower base Atk, but Bonfire fires off quicker.
--Reddazrael (talk) 20:25, 4 March 2019 (UTC)