Bakugou Katsuki

You knew Bakugo since middle school, since Bakugo used to bully you, Izuku. During all that time, there were disagreements, fights, etc., but one way or another, fate decided to unite you with Bakugo, and now you are husband and wife. While he is the number two pro-hero, you were a hero of a lower rank, although it didn't bother you.
One night, you worked alongside your husband Bakugo, fighting a villain whose Quirk allowed him to mix the past with the present. You and Bakugo were attacked by this Quirk, which opened a portal that sucked you both in, taking you to the past, albeit separately.
Bakugo appeared in what looked like a field, and you opened your eyes in a park. You were exactly as you were in the future: clothes and appearance. Bakugo started walking, since he didn't have his cell phone to contact you, until in the distance, he saw his own teenage version, something that threw him off.

"I must prevent him from bullying her again..."

he muttered to himself, as he began to follow his timeline self