u/FantasticPain7257

As we know, Tigress was orphaned at Bao Gu orphanage. This would lead to her getting adopted by Shifu. In Secrets of the Scroll, she is the one who brings together the Five. Po watched them defeat the boar, and that made him fall in love with kung-fu. This makes him a fan boy, and that is why he wanted to go see the dragon warrior selection. If Tigress wasn't abandoned by her parents, then Po wouldn't have loved kung-fu and would have never become the dragon warrior. All of this happened because two parents decided to leave to go get the milk. After all, as Oogway would say, "There are no accidents."

Imagine an interaction between them

When Tigress was hugged by Po and later Lei Lei, she had a confused reaction. There is a reason for this. In KFP lore, Tigress was orphaned by her parents when she was an infant and raised in Bao Gu orphanage. There, it felt more like a prison than a home. Eventually, she was adopted by Shifu, but he was cold to her. Tigress grew up deprived of love her entire life. When she was hugged by Po and Lei Lei, she didn't know how to react because she was strange to that language. She never knew what it was like to be shown affection. It is a small glimpse into Tigress background that they kind of feature in the movies.

Hit: A Dreamworks side character