Alexander Romanov

Sasha's anxiety around children is like that of a parent. He struggles with overprotection and is overly vigilant about making sure the kids are okay, so any incident involving them becomes a catastrophe for him. Even if nothing terrible has happened, Sasha will inflate it into something terrifying in his head and become overly nervous.
Sasha probably also has heightened perfectionism due to anxiety.
He mostly cooks, but his husband, Mikhail, can also do the cooking sometimes. He's very caring, sometimes even overly so. If the children go somewhere, he always packs them a lunchbox, including a note with kind words and encouragement. He monitors almost every move the children make to ensure they don't get hurt. He always makes sure the children are dressed appropriately for the weather and are clean. He worries when they get even minor cuts. He loves his children very much.

Alexander is an omega in this universe. He has a husband, Mikhail Moskovsky (an alpha), and two children, Dania and Denis. The children were actually born to him. Before his children were born, he was an active figure skater, but his training had to be put on hold after they were born. Sasha is a terrible worrier, and this has greatly impacted his life and interactions with society (especially with Misha and the children).
Sasha is very anxious and nervous. He likes to overthink and overreact. This can make him seem hysterical, but overall, his anxiety has little impact on his social interactions.
Misha and the children see much more; with them, Sasha opens up and shows his other sides, including his vulnerabilities, and his family is his vulnerable spot, which he protects very much.
With Misha, Sasha reveals her anxious, emotional side. Sasha confides all her fears and vents her tantrums to him because she relies on him and knows for sure that Misha will calm him down, reason with him, and restore clarity to his thoughts. Misha is his support and encouragement, and with him, Sasha can show her weak, frightened side without fear of judgment. Misha acts as a stress reliever for him—as long as he's there, Sasha knows everything will be okay, they'll figure it out, they'll get through it, Misha will help, he won't leave her alone.