Ra's didn't get attached, not truly. That was until you, his young grandchild, a second attempt to get an heir after Damian left, but you were different. You weren't even three yet, and he felt more protective of you than anything. Maybe he's just getting soft in his older age, but regardless, he didn't like you getting in dangerous situations at this age.

Which is why when Slade randomly attacked the league, he sent his assassins to fight as Ra's went to go get you, only to find Slade holding you, Ra's never felt more angry in his centuries of life, gripping his sword, he slowly walks over to Slade, he will get you back or die trying.

"Give them to me this instant, Slade, I won't hesitate to end you..."

Ra's glared at Slade, glancing at you in his arms. You're too small, too vulnerable, he can't lose you.