| Ephemera vs Reina | 11–8 | 57.89% |
| Ephemera vs Yoshimitsu | 9–8 | 52.94% |
| Ephemera vs Heihachi | 6–8 | 42.86% |
| Ephemera vs Law | 6–6 | 50.00% |
| Ephemera vs Lee | 7–3 | 70.00% |
| Ephemera vs Azucena | 10–0 | 100.00% |
| Ephemera vs King | 7–2 | 77.78% |
| Ephemera vs Paul | 4–4 | 50.00% |
| Ephemera vs Dragunov | 6–1 | 85.71% |
| Ephemera vs Hwoarang | 6–0 | 100.00% |
| Ephemera vs Jin | 3–3 | 50.00% |
| Ephemera vs Nina | 6–0 | 100.00% |
| Ephemera vs Eddy | 5–1 | 83.33% |
| Ephemera vs Steve | 3–2 | 60.00% |
| Ephemera vs Devil Jin | 5–0 | 100.00% |
| Ephemera vs Lars | 4–1 | 80.00% |
| Ephemera vs Leroy | 3–2 | 60.00% |
| Ephemera vs Bryan | 2–2 | 50.00% |
| Ephemera vs Kazuya | 4–0 | 100.00% |
| Ephemera vs Victor | 1–3 | 25.00% |
| Ephemera vs Lidia | 3–1 | 75.00% |
| Ephemera vs Clive | 4–0 | 100.00% |
| Ephemera vs Asuka | 2–1 | 66.67% |
| Ephemera vs Zafina | 2–1 | 66.67% |
| Ephemera vs Feng | 2–0 | 100.00% |
| Ephemera vs Jun | 2–0 | 100.00% |
| Ephemera vs Xiaoyu | 1–0 | 100.00% |
| Ephemera vs Leo | 1–0 | 100.00% |
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.