Akira is essentially the one she chose to be her spouse, the waifu maid is essentially something close to if not a literal god from what i've gathered (it hasn't been stated yet but i think she also knows about his original life as well, though this is partly a guess on my part), akira's so strong however that with his power awakened it would put him in danger of being used by others so much that it could cause a world war not to mention her enemies wanting his power for themselves, you'll get a taste of this power of his around chapter 40 if i remember right, hence she sealed his power, keep in mind at chapter 40 he's still only at 30% btw, his power essentially being the power of creation but him not being fully aware of his ability.