ナツ(CV:柿原徹也)'s 'Eternal Fellows' came out on April 27, 2011. With this song being around four minutes long, at 4:01, the duration of this song is pretty average compared to other songs. This track is safe for children and doesn't appear to contain any foul language, since the "Explicit" tag was not present in this track. There is only one song in アニメ「FAIRY TAIL」キャラクターソングアルバム Eternal Fellows, so we believe that "Eternal Fellows" is a single. The popularity of Eternal Fellows is currently not that popular right now. In our opinion, the overall tone is not very danceable and projects negative sounds, such as being sad, depressed, or angry.
The tempo marking of Eternal Fellows by ナツ(CV:柿原徹也) is Vivace (lively and fast), since this song has a tempo of 175 テンポ. With that information, we can conclude that the song has a fast tempo. The time signature for this track is 4/4.
F Major is the music key of this track. This also means that this song has a camelot key of 7B. So, the perfect camelot match for 7B would be either 7B or 8A. While, 8B can give you a low energy boost. For moderate energy boost, you would use 4B and a high energy boost can either be 9B or 2B. Though, if you want a low energy drop, you should looking for songs with either a camelot key of 7A or 6B will give you a low energy drop, 10B would be a moderate one, and 5B or 12B would be a high energy drop. Lastly, 4A allows you to change the mood.