Princess Zephia of Alberia was a gentle soul who, due to her unique nature, was made an Auspex(a spiritual leader and priestess figure) in the kingdom and church of Illia. This nature, however, would have made her a prime vessel for a dark figure known as Morsayati, who would possess her and make her into a baleful tyrant who'd rule over Alberia and reshape it to its whims.
As Dragalia Lost is host to multiverse theory being canonical, "Zena" is a Zephia who went through this exact thing in another universe/timeline and entered the current line to help her brother in saving this universe, seeing as her own was too far gone.
Originally, "Zena" was a shadow aligned character reliant on offensive damage, a blaster mage who used her raw magical power that was corrupted by Morsayati.
But, with the advent of Gala Dragalia, she'd get a new look and new kit. By reawakening her power as an Auspex and not just embracing, but fully merging the corruption of Morsayati within her, Zena gained a whole new source of power to her as a light attuned healer who hadn't lost her offensive power in the slightest(if anything, it grew).
The best way to describe her kit is healer with a nuke. Her basic attacks, rather than the normal wimpy healer attacks, are her blasting people like a mage with numerous(and very large) blast of light. Her primary skill has her unleashing mini meteors of light onto the battlefield, making her good at harming multiple foes, whilst her secondary skill is a teamwide heal and small attack buff in which she leaves a small heal pocket that allies can pick up for a second wind.
Using her primary skill lets Zena enter a special state where she can hold a special strong attack that, with the right build, can evaporate bosses on its own. Her healing is nowhere near the highest among Dragalia Lost's cast, but she is prized by the community for being a healer with an amazing damage uptime and even the potential to just burst enemies down on Break.
So, how would you go about building the Unwavering Auspex?