A beautiful girl who transmigrates into a Herrscher of the Void is treated like an elf and conquered

It's a marriage arrangement; apologies to the brothers who stumbled upon this.
[Getting Married] [Fun] [Humorous] [Daily Life] [Drama Queen] [Oops, I've Become the Main Wife] [Script Collapse] [Dual-Core Driven (Tentative)] [Challenge]
I am Chiin Hououin, a transmigrator. Originally, I planned to cling to Shido's coattails and provide crucial support, then become a lowly employee at Fraxinus and live a life of leisure. However, in the year the main story begins, I was targeted by Aha, who gave me the power to transform into a Herrscher. After assimilation into the world, I became a spirit who wields Herrscher abilities.
As for what happens next? Hmm... let's stick to the old plan and give Shido an assist, shall we? He can't possibly try to seduce me, can he?