Halos vary in colors, shapes, and designs, mostly referencing their respective students' personalities or general character theme. The presence of a student's halo generally can be used to determine whether they are conscious or not Observe in the very first pv for blue archive how even a news broadcaster blimp has a halo
The halos are visual representations of active structural reinforcement fields, applied to various entities.
An overview of all characters implemented on the wiki
Please also see the following listings Interactive chart of character stats unique weapons list unique gear. All images are taken from wikiru Erika's halo is formed by a light grey circle intersected with three lines that together form a crosshair and three arrows that point outwards
The black shirt has the gehenna symbol on the left side of her chest.
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