| Ruonin vs King | 27–23 | 54.00% |
| Ruonin vs Reina | 24–15 | 61.54% |
| Ruonin vs Kazuya | 13–19 | 40.62% |
| Ruonin vs Jin | 15–14 | 51.72% |
| Ruonin vs Law | 15–11 | 57.69% |
| Ruonin vs Paul | 10–13 | 43.48% |
| Ruonin vs Clive | 10–13 | 43.48% |
| Ruonin vs Lili | 10–12 | 45.45% |
| Ruonin vs Jun | 12–9 | 57.14% |
| Ruonin vs Hwoarang | 8–12 | 40.00% |
| Ruonin vs Yoshimitsu | 11–8 | 57.89% |
| Ruonin vs Dragunov | 9–10 | 47.37% |
| Ruonin vs Lars | 5–14 | 26.32% |
| Ruonin vs Azucena | 6–11 | 35.29% |
| Ruonin vs Victor | 9–8 | 52.94% |
| Ruonin vs Eddy | 11–4 | 73.33% |
| Ruonin vs Steve | 8–5 | 61.54% |
| Ruonin vs Heihachi | 3–10 | 23.08% |
| Ruonin vs Devil Jin | 6–5 | 54.55% |
| Ruonin vs Lidia | 5–6 | 45.45% |
| Ruonin vs Jack-8 | 5–5 | 50.00% |
| Ruonin vs Leroy | 4–6 | 40.00% |
| Ruonin vs Bryan | 3–6 | 33.33% |
| Ruonin vs Claudio | 5–4 | 55.56% |
| Ruonin vs Lee | 4–5 | 44.44% |
| Ruonin vs Asuka | 3–5 | 37.50% |
| Ruonin vs Alisa | 5–2 | 71.43% |
| Ruonin vs Leo | 3–2 | 60.00% |
| Ruonin vs Nina | 4–1 | 80.00% |
| Ruonin vs Zafina | 4–1 | 80.00% |
| Ruonin vs Xiaoyu | 3–0 | 100.00% |
| Ruonin vs Shaheen | 2–1 | 66.67% |
| Ruonin vs Feng | 0–2 | 0.00% |
| Ruonin vs Kuma | 1–1 | 50.00% |
| Ruonin vs Raven | 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.