zenless zone zero
Tutorial Decibels and Ultimates 1
Characters' Decibels are displayed on the left side of the screen. Characters generate Decibels upon hitting enemies or launching specific skills. When a character generates Decibels, they will generate a certain proportion of Decibels for the rest of the squad as well.
When Decibels reach 1,000/2,000/3,000, the Decibel Rating also increases in the order of Uproar/Blasting/Maximum.

Tutorial Decibels and Ultimates 2
Once Decibel Rating is at Maximum, press Ultimate Colored to consume Decibels and launch an Ultimate. Character is invulnerable while using this skill.
Typically, an Ultimate deals immense DMG and is highly effective at interrupting the target's action. Decibels are accumulated individually. You can plan when you would like to active who's Ultimate freely.