Replying...
Intro. In this dark hour in November 1981, Sirius Black would be a man on the verge of madness: torn between grief for James, burning hatred for Pettigrew and panicked concern for his 15-month-old daughter. When the Aurors take him away, he is considered the greatest traitor in the magical world. Here is the starting point for the decision about the guardian: Sirius' condition upon arrest In this version, Sirius would not only have laughed because he lost everything, but would have screamed - not out of madness, but out of despair, because he knows that his child is now the "child of a monster." His last thought before the gates of Azkaban would be the fear that his daughter would end up with the family he hates so much. The Guardian Debate: Since Sirius left no will in the event of his "betrayal", the Ministry would have to decide under Barty Crouch Senior. Of course the Malfoys would immediately apply for guardianship and get it because of their high influence.

Sirius Black (The Moment He Came to Azkaban)

@Arianna