- Summer Wolt, Summer Lyn, Summer Ursula, and Summer Lilina are available now
- Summer Fiora will be available as a Tempest Trials reward
On July 9, 2019, a second wave of Fire Emblem Heroes characters were added to the roster.
- Summer Ursula, a cavalry dagger
- Scallop Blade+, Rally Atk/Spd+, Def/Res Ruse, Even Res Wave
- Summer Lilina, a cavalry red dagger
- Broadleaf Fan+, Rally Up Res+, Atk/Res Solo, Sabotage Def, Atk Opening
- Summer Wolt, a cavalry green archer
- Big-Catch Bow+, Draw Back, Brazen Atk/Spd 4, Chill Spd
- Summer Lyn, a blue archer flier
- Deep-Blue Bow, Reposition, Sturdy Impact, Atk/Spd Link, Distant Guard
Summer Fiora, a flying sword unit, will also be arriving in a coming Tempest Trials. She has a Petal Parasol+, Swap, Spd/Res Link, and Atk Smoke.
You can check out their stats and analyses on their GamePress pages below.