After great* thought on the concept of Bitsy as Lottie’s mentor, I have concluded that Beate wanted a mentor and asked the great Kendo Miyamoto to mentor her. After she was rejected and discovered that Kendo san wished to mentor Lottie instead, Beate exploded with rage…
Then she leveraged her violent outburst to frame Lottie

…and the rest we know

*a moment’s