Review of Attack on Titan: No Regrets
The story is very good! (Rating: 8) Here we learn a little about Levi, but I won't give any details because I don't want to spoil it. Personally, I really like it when authors delve deeper into important characters like this. Instead of simply putting it in the middle of the story, it's separate but coherent. The secret to this high level of detail in the character is the fact that this material came from the Light Novel. This allows for greater depth than in manga, if used well. In other words, the author and those involved in the production of the anime are of the highest level,because whatever medium they use to express themselves, everything is finished very well.
Conclusion: I RECOMMEND IT!
Detail: These OVAs can be watched in any order, but I recommend watching them after the first season, as you will already have seen a little of everything, and watching these two episodes will help you connect more with Levi from here on out. This will make the experience even better!