|Linde is, as a unit, incredibly similar to Delthea. While they are both support oriented blue infantry mages, Linde trades a small amount of Attack and Resistance for a small amount of Hp, Defense, and Speed. Where Delthea helps your other infantry allies secure K.O.'s that might otherwise be out of reach, Linde helps your team survive a gauntlet of battles, utilizing Aura's unique passive as well as Breath of Life 3 and the Breath of Life 3 seal to heal 15 hp to each ally adjacent to her every time she initiates combat. This build shines in Tempest Trials, where you can use Linde in place of a dedicated healer to push faster runs.
Going over her offensive capabilities, Linde boasts a massive 54 Attack and blisteringly fast 44 speed. This allows her to naturally double nearly EVERY unit in the game (Notable examples who she does NOT double include a Fury Anna, Felicia, Bridal Caeda and Ylissean Summer Gaius, as well as a Mulagir/Fury Brave Lyn). Even in situations where she does not double, Linde's impressive attack stat is capable of punching massive holes in even the hardiest of enemies, leaving her newly invigorated allies to clean up.
Moonbow is selected both for its low cooldown and its ability to tip exchanges with high speed high resistance units such as Felicia and Anna in Linde's favor.
Proper positioning is critical to taking advantage of Linde's healing capabilities. At certain times it is preferable to position Linde in such a way where she will engage with an enemy she cannot defeat in one round (such as many of the Tempest Trials stat inflated green enemies) simply so your refresher unit can allow her to attack again, doubling her already impressive healing ability. In a pinch Ardent Sacrifice can be used both to push Linde into Desperation range, where she becomes a oppressive offensive force, as well as healing a would-be-doomed ally.
Popular checks and counters to look out for include Hector and Titania, whose undeniable bulk and triangle advantage make for a nearly unwinnable fight for the Light mage as they shrug off her damage and retaliate with lethal damage due to her embarrassingly low defense. Cecilia, Nino and Soren also are more than capable of shutting down Linde, despite taking severe damage in the process if Linde initiates combat. Finally, the newly released Lyn (Brave Heroes) is capable of reaching far beyond what would normally be expected, dealing devastating damage to Linde with the combination of Swift Sparrow and her ability to invalidate any buffs you may have placed on Linde to avoid unfavorable trades.
Due to these weaknesses Linde pairs well with Red Mages and infantry swordsmen. Especially Fury users such as Ike or Ryoma, who can easily pick off the green mages and tanks that get in her way while she keeps the recoil damage from fury in check. Overall Linde is a fantastic unit whose specific niche has never been strongly contested, even with Delthea's increased offensive support. When it comes to Tempest Trials and extended engagements, none can top the versatility and destructive potential of the Light Mage and her legendary tome.