At first, Yuu-chan didn't know what "Mama" meant either.
Then one day, Papa told her that if she called someone "Mama," she could snuggle in Mama's arms just like she snuggled in Papa's.
At first, Yuu-chan only called Takao "Mama" for fun, then threw herself into Takao's arms and thoroughly enjoyed herself.
After that, having gotten a taste for it, Yuu-chan started trying to call people "Mama."
"Mama Mogami~ Can I touch your horns?"
"Mama Amagi~ Can I touch your ears?"
"Mama Enterprise~ Can I take Little Eagle out to play?"
Later, Yuu-chan gradually mastered the technique.
"Mama Jean Bart~ I want dessert~"
"Mama Bismarck~ I want uppies~"
"Mama Illustrious~ I want you to lull me to sleep~"
Finally, showered with love from everyone, Yuu-chan completely let loose.
"Mama Monarch~ Mama Wales~ Let's play a game with Papa together!"
"Mama Akagi~ Mama Roon~ Let's sleep with Papa tonight!"
"Mama Ark..."
"Wait! Not her! You can't call her Mama! She'll corrupt you!" Hongjian, who had grown somewhat numb watching from the side, suddenly snapped out of it and shouted in a panic.