| Ruka vs Dragunov | 182–158 | 53.53% |
| Ruka vs Hwoarang | 152–147 | 50.84% |
| Ruka vs Bryan | 156–125 | 55.52% |
| Ruka vs Reina | 140–116 | 54.69% |
| Ruka vs Yoshimitsu | 145–106 | 57.77% |
| Ruka vs Victor | 143–99 | 59.09% |
| Ruka vs Steve | 135–106 | 56.02% |
| Ruka vs King | 142–96 | 59.66% |
| Ruka vs Kazuya | 110–109 | 50.23% |
| Ruka vs Alisa | 123–93 | 56.94% |
| Ruka vs Asuka | 105–105 | 50.00% |
| Ruka vs Paul | 124–85 | 59.33% |
| Ruka vs Jin | 112–92 | 54.90% |
| Ruka vs Feng | 102–100 | 50.50% |
| Ruka vs Nina | 116–72 | 61.70% |
| Ruka vs Shaheen | 86–90 | 48.86% |
| Ruka vs Lili | 99–75 | 56.90% |
| Ruka vs Lee | 96–77 | 55.49% |
| Ruka vs Eddy | 87–85 | 50.58% |
| Ruka vs Jack-8 | 95–71 | 57.23% |
| Ruka vs Lars | 87–73 | 54.37% |
| Ruka vs Xiaoyu | 89–70 | 55.97% |
| Ruka vs Law | 87–67 | 56.49% |
| Ruka vs Devil Jin | 79–75 | 51.30% |
| Ruka vs Claudio | 75–76 | 49.67% |
| Ruka vs Azucena | 73–60 | 54.89% |
| Ruka vs Zafina | 66–66 | 50.00% |
| Ruka vs Raven | 70–57 | 55.12% |
| Ruka vs Leroy | 65–61 | 51.59% |
| Ruka vs Jun | 56–67 | 45.53% |
| Ruka vs Heihachi | 53–70 | 43.09% |
| Ruka vs Leo | 52–57–1 | 47.71% |
| Ruka vs Kuma | 55–50 | 52.38% |
| Ruka vs Clive | 25–62 | 28.74% |
| Ruka vs Lidia | 38–37 | 50.67% |
| Ruka vs Panda | 26–19 | 57.78% |
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.