Loki appears in Xenologue 2, where she and Veronica discuss the Tempest while being disguised as Bruno, but as Veronica realizes that Loki isn't her brother, Loki reveals her ability then disguises herself as Sharena, Alfonse, and Anna. But she chooses to stick with the Anna disguise. Later in Paralogue 10, Loki obtains the Naglfar and states her desires to construct a bridge so Surtr can assist Veronica. In Paralogue 13, Loki states she had ample to prepare for the rite in order for Surtr's troops to invade Zenith.
In Chapter 1, just as Loki is about to kill Fjorm, the Order of Heroes save her in time and Loki reveals her true form and retreats while taking interest in the Summoner. In Chapter 2, Loki yet again attacks the Order of Heroes, this time being allied with Surtr and Laevatein.
In the first Røkkr Sieges event, she confronts Thor over the creation of the Røkkr.
While much isn't known about Loki, she is still able to disguise herself and seems to know much about the Tempest.
Loki appears as a villain in Dragalia Lost as part of the Fire Emblem: Lost Heroes event. She temporarily disguises herself as Veronica and commands the Imperial army against Euden and the Halidom. She later appears undisguised, working with Harle and restoring the real Veronica's memory.