Board Thread:General Discussion/@comment-26516813-20190711012913/@comment-33165688-20190728142720

Giger Van Gogh, you really should read What Is Ninja?, like Gilgameshkun mentioned, which outlines pretty much Jennika's childhood, teen years and young adulthood, and pretty much shows WHY she's been so fiercely loyal to the Foot Clan. They were the first group that welcomed her, to which she "belonged" and which, from her perspective, took care of her. They gave her purpose and a home.

It also kind of explains her attachment to Splinter and the Turtles. Splinter is the kind of fatherly figure that she never had, while the Turtles are figures that inspire her.