The events that lead up to Sophie earning her "Godmother" title.
Sophie confessing that she wants to have a family with Asbel as her father and Cheria as her mother, so Asbel adopts her.
At the end of the Future Arc, when Sophie offers the last surviving Little Queen to join her family.
Gets even better when Lambda tells the gang he'll have a talk with Fodra for a few decades and return to spend eternity with his new friend Sophie.
A skit in the Future Arc where Sophie talks about how happy she is to have a family now. Asbel and Cheria are her parents, Hubert is her uncle, Pascal and Richard are her big siblings and Malik is her grandpa. The party all pretty much fit into this role naturally as True Companions.
The "Secret Fort" scene in Future Arc. Friendship moment!
Hubert goes from beating Asbelto a pulp after the timeskip to threatening to beat up LAMBDA if he hurts his brother at the end of the future arc. Bro moment!
And on a similar note, the scene in which Malik and Richard try to help Hubert get out of his marriage to the president's daughter is mostly a Crowning Moment of Funny, but there's a heartwarming note at the end, because we all know why Hubert won't get married.
Hubert: If I am to support this country in the future, I must maintain my connection to the common people. (his voice goes very soft) Just as I know she will.
A small background element during The attack on Lhant while Sophie is sick. If you talk to a Strahtan soldier comforting a Lhant solider, it's completely clear that members of these two seperate militaries have come to genuinely care for eachother.