Episode 1: Sisters

Sisters (姉妹, Shima) is the first episode for the Regalia anime. It aired on July 7, 2016.

Information
Twelve years ago, two Regalia Gear fought each other in the Kingdom of Ringarde. In the present, two sisters, Rena and Yui enjoy breakfast. Seeing Rena's annoyance at her taking on more responsibility despite being the younger sister, Yui invites to go out after school to cheer her up.

However, as Rena waits for Yui to arrive from school, she is confronted by her old acquaintance Kei, whom tells her to come with her if she wants to learn what really happened twelve years ago. Rena calls Yui to say goodbye and leaves a present for her. At a harbor, Rena encounters a man whom attacks her using his Regalia Gear. Rena brings out her own Regalia Gear but is easily defeated. Yui, having followed Rena, then comes to her aid. Rena reveals to Yui that her real name is Magna Alecto and "Rena" is it's core.

Because she isn't human, Rena believes she can't stay with Yui. Yui, however, states that even if they aren't blood related, they are family. Letting Yui pilot her, Magna Alecto is able to defeat the other Regalia Gear. Afterwards, the two reconcile and Yui opens her present, a neckless containing the identical ring the two wore during their childhood. Later, Yui attends a conference as Yuinshiel Asteria, the Empress of Enastoria