Tail

Gender: Male
Species: Heliobus
World: The Xianzhou Luofu

Tail is the most powerful fragment of the great heliobus Ignamar, and represents the arrogant side of Ignamar. Like most heliobi, Tail is arrogant and is rude to most people he meets, including other heliobi. He frequently insults those around him and says what he thinks without consideration for others' feelings. Despite this, however, he seems to show genuine care for Huohuo and her wellbeing. He is seen frequently encouraging her and reassuring her that she is able at her job, albeit in a harsh manner.

(Source: Honkai: Star Rail Wiki)