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-I feel like he would only want a relationship with someone as everlasting as him
-So you’d have to be another Eternal like him or some other form of deity/immortal being for him to allow himself to love you
-Very much into physical forms of affection
-He isn’t very good with his words so he shows his love through him being by your side
-Whether that be pulling you into a hug
-Or resting his hand on your shoulder
-He’ll be there
-Actions are also a form of his love: he’ll carry things for you, ensure that you’re always safe and just be 100% the cutest at all times
-He’d most definitely teach you how to fight
-He hates the thought of leaving you defenceless
-Always protects you if you help the Eternals fight the deviants
-The other Eternals would adore you, mostly because you would make Ikaris more bearable to be around
-He is generally much nicer, which the others constantly praise you for and tease him for
-He would be hesitant to marry you, not that he doesn't want to spend his forever with you, he does, he just doesn't want to bind you to him incases you change your mind
-But after a lot of convincing, a small wedding happens with just the Eternals and an officiant of some kind are present
-You would live together in a small cabin in the Swiss Alps. You would have built it together to a design Phastos had created specifically for you
-When he learns of the eternals' true nature after Babylon, he debates leaving you, not wanting to live with you knowing your fate
-But, with Ajax's suggestion, tells you of the future
-This makes him want to savour every moment you have left, now knowing that your time is limited
-He asks Ajax to speak to Arishem about having you regenerate when the Celestial is born from the Earth but she never did, already certain of the answer
-When he makes his choice to die after fighting to keep the celestial alive, he kisses you goodbye one last time, whispering promises of love in your ear before he flies into the sun.