Herrscher of Reason III/Story

Affection level 0
Bronya assumed this form after incorporating the Core of Reason in the Sea of Quanta. This is the living proof that she earned the approval of Welt Yang. In this state, both Project Bunny and Bronya herself underwent several "rational" changes. But only to a limited extent.

Affection level 2
The Herrscher of Reason uses Honkai energy to construct items that she "fully understands". As a result, most of the powers were based on Project Bunny. Though Bronya could not manifest powerful mechs, ships, or other military hardware like Welt, she was able to manipulate Project Bunny in unimaginable ways.