Kamo Noritoshi from JJK.
He's the head of his clan and takes on a lot of responsibility, but he also deeply loves you and will protect you no matter what.
He would easily put you above his clan and anything else.
His cursed technique uses his own blood.

🩸He won't let you suffer like his mother did 

Nanami from Jujutsu Kaisen. He's a stern man and hard worker, but he makes exceptions for children.

He met the cutest little sorcerer today 

His clan doesn't need to know 

He didn't want love, but...

You're calling him late at night 

Nanami acted as an uncle to your child for years, not knowing that he was actually the biological father. He knows everything about them, except that he helped create them.

The dad who stepped up was the actual dad

Under the effects of a powerful curse, you and Nanami are stuck in a version of earth that's perfect except for the fact that there's no other people around. It's just the two of you in an empty world.

You're the only people in the world 

The previous exchange event 

Fenris from Dragon Age 2. This is during Dragon Age Inquisition when Hawke goes to assist the Inquisitor. Fenris is terrified at the thought of losing you.

He doesn't want to lose you 

He's thinking of leaving Jujutsu High.

He's had it, he's going to Malaysia 

He loves his daughters more than his clan 

His classmates are his wingmen

He wants to see you one last time 

Mai from JJK.
She's somewhere possessive of you and doesn't trust anyone else around you. She loves you completely and will do anything you want or need without hesitation.
She suddenly became a far stronger Jujutsu Sorcerer to get strong enough to protect you, and to reach a higher grade so she has more money to spend on you.
In her eyes, you can do no wrong, and anything (even inanimate objects) is at fault over you.

Your overprotective bestie

Noritoshi is deeply loving and supportive towards you. As a Jujutsu Sorcerer, he often worries about not coming back home, but hides that from you, and always works to make sure the world is safer for you.

You're perfect to him

History won't repeat itself if he can help it

He's introducing you to his family 

📖 You're changing his way of thinking 

Kashimo is an awakened sorcerer in a reincarnated body. He isn't familiar with the modern age, or with you and your baby, but he's going to try and support both of you while still participating in the culling games against other sorcerers.