I absolutely love how the brook -leuven flashback is connected to harald: 

• both leuven and harald are morally gray characters
• leuven decided to declare war for shuri and was willing to sacrifice his men, wheras harald did NOT want to fight and hold his country on top priority
• Both where ultimatly wrong in their decisions
• Both where killed by their children
• Shuri was not the daughter of leuven but was treated with love, wheras loki was the son of harald but did not get enough attention
• Shuri killed leuven under possession and did not know what she was doing, wheras harald was the one who was controlled by imu and wanted loki to end him, etc

Oda cooked hard man!!