I Became The Adopted Daughter Of The Sea Guardian

“who’s the garbage with zero morals saying they’ll marry a five-year-old?!” i thought i had died in vain due to the betrayal of a comrade when i was a grand mage, but i was given a new life as ‘nazia de lavoie,’ the daughter of a baron. however, in this weak and frail body, i was treated as the family’s outcast and eventually sent off as a bride to the war-obsessed demon, duke iter. at the tender age of five, no less! i assumed he was a heartless scoundrel, but the duke of iter’s reaction to me was completely unexpected— “i accept lady lavoie as a member of iter. if the lady so desires, she can be my adopted daughter.” is this the beginning of act two—or rather, act three—of my life?