Frankly, I think that the Spirit magic houses are criminally underdeveloped in the lore of Ashan. It creates the impression that before the appearance of the undead and constructs, magic users were not significant, which doesn't align with the history of the Orcs, as some forces were needed to enslave them and drive them out of the country after the rebellion.

In this regard, the House of Aether, the House of Material, is the most developed. The House of Chimera is slightly less developed. As I understand it, Zephyr and Cyrus are from the House of Material. Although Zephyr's ability directly references the House of Anima. And his grandfather, Az-Rafira, can be attributed to the House of Chimera. In short, it's complicated. In the fifth game, there is nothing about the houses at all. In essence, they began to be described in the sixth game, but more extensively in the seventh.