| Byleth vs Hwoarang | 5–7 | 41.67% |
| Byleth vs King | 6–3 | 66.67% |
| Byleth vs Xiaoyu | 6–1 | 85.71% |
| Byleth vs Lili | 2–5 | 28.57% |
| Byleth vs Yoshimitsu | 5–1 | 83.33% |
| Byleth vs Armor King | 3–3 | 50.00% |
| Byleth vs Law | 4–1 | 80.00% |
| Byleth vs Jun | 3–2 | 60.00% |
| Byleth vs Paul | 1–2 | 33.33% |
| Byleth vs Jin | 2–1 | 66.67% |
| Byleth vs Dragunov | 2–1 | 66.67% |
| Byleth vs Leo | 2–1 | 66.67% |
| Byleth vs Kazuya | 2–0 | 100.00% |
| Byleth vs Steve | 2–0 | 100.00% |
| Byleth vs Asuka | 0–2 | 0.00% |
| Byleth vs Devil Jin | 1–1 | 50.00% |
| Byleth vs Feng | 2–0 | 100.00% |
| Byleth vs Panda | 2–0 | 100.00% |
| Byleth vs Azucena | 0–2 | 0.00% |
| Byleth vs Bryan | 1–0 | 100.00% |
| Byleth vs Nina | 1–0 | 100.00% |
| Byleth vs Kuma | 1–0 | 100.00% |
| Byleth vs Leroy | 1–0 | 100.00% |
| Byleth vs Reina | 1–0 | 100.00% |
| Byleth vs Victor | 0–1 | 0.00% |
| Byleth vs Raven | 1–0 | 100.00% |
| Byleth vs Lidia | 0–1 | 0.00% |
| Byleth vs Heihachi | 1–0 | 100.00% |
| Byleth vs Clive | 0–1 | 0.00% |
| Byleth vs Miary Zo | 0–1 | 0.00% |
Limitations
This data is often requested to give insight into which characters you have more trouble with than others, but it is not particularly helpful for that. The main issue is that it is heavily skewed by how strong the opponents you play are.
For example, this data suggests my worst matchup is clearly vs Reina, but that's just because most of those games are vs Yagami.
There is a way to account for this being worked on. The central idea is to assign each matchup a rating vs you which adjusts based on the result, much like the regular rating but also based on the rating of each player. With this, it would give a better summary of how well you perform vs each character.
In the meantime, this page is here to present the data as requested.