Tag used for Lyn (Fire Emblem) from Fire Emblem specifically when dressed in her summer attire from the Fire Emblem Heroes 2019 Summer Refreshes banner.
Can typically be identified thanks to the attire's characteristics: a Blue Bikini that is a Strapless Bikini and a Side-Tie Bikini Bottom, Gladiator Sandals, a stylized blue Bow (Weapon) and Arrow (Projectile), a Hair Flower ornament that includes a Hibiscus, a Choker with a Seashell, and a yellow Sash tied to a brown Belt
Note that it's possible (especially for older artwork) to depict Lyn in a swimsuit without it being the one described above, in which case this tag should not be used.