This role seems to fit Hero perfectly.
In my opinion, their marriage will be very successful. It is a lively comedy that ends in multiple marriages. It does not take much for him to abandon and humiliate the one he is supposed to be in love with.
I think that Beatrice marries Benedick because she knows that they have a relationship that has all the signs of proving successful, with each partner sharing an equal status.
They are older; they have been around the block a few times. They have been fighting nearby not quite clear for whom—but Italy was full of mercenary armies, and skirmishes between city-states were common. She may not even be in love, but that does not seem to her enough of a reason to object.
All is going well between them and we do not hear much about Hero and Claudio and they are only mentioned individually a few times until the wedding ceremony. They both also try to disguise their feelings for one another through trickery but this does not last for long as their feelings are mutual and genuine.
As the play continues, the relationship between Beatrice and Benedick starts to blossom and finally results in the couple revealing their true feelings for each other.
We can see an example of this when in Act 4 Scene 1, linesLeonato accuses his daughter, Hero, of being unfaithful towards Claudio. And so we come to Much Ado About Nothing. Claudio hears that Hero has been unfaithful and decides not to approach her with the allegations, instead leave it till the ceremony where he plans to announce it and embarrass Hero in font of the entire church.