You will see players call a character T0 or T1 constantly in mobile game discussions. The T stands for tier, and the number is the band: T0 is the very top, T1 is just below it. This guide explains the numbering, how it maps to the S/A/B letters, and how much weight to give it.
Tiers were originally numbered from T1 downward, with T1 meaning the best. As power levels rose, communities needed a band above the old top, so T0 was invented for characters that stand clearly apart from everything else. Today T0 means outlier-strong, T1 means top-tier and fully competitive, T2 means solid and dependable, and T3 or lower means situational or outdated.
The two systems say the same thing in different notation. T0 lines up with SS or S+, T1 with S, T2 with A, and T3 with B. Neither scale is standardised, so one creator's T1 can be another's S tier and a third person's A tier. Read the chart's own legend rather than assuming the labels carry the same meaning across sources.
A T0 label is a snapshot of one version, one game mode and one author's testing. Balance patches, new content types and fresh releases reshuffle the order constantly, and a character labelled T0 for a raid boss may be mediocre in arena. Investment level matters more than the label: a well-built T2 unit with the right gear routinely outperforms a neglected T0.
Is T0 higher than T1?
Yes. T0 was added above the original T1 top band, so it marks characters considered a clear step above everything else in the current version.
Do I need a T0 character to progress?
No. Story and event content in most mobile games is tuned so that mid-tier and free characters can clear it with proper investment and team building.