Alongside being in the same key, Ryu Hayabusa's theme music "The shooted" and Ein's theme "Vigaku" both feature a recurring guitar solo. While "Vigaku" plays a few different arrangements of its solo throughout the song, the solo as heard in "The shooted" is played the same way throughout the majority of the song except for the very end, where a different take on it is played. When comparing the primary solos in both "Vigaku" and "The shooted", while both solos play through a similar scale of notes, there are some individual notes in each solo that are different to distinguish them from each other rather than fully recycling them. In the game's soundtrack released on CD, "The shooted" is placed ahead of "Vigaku", suggesting that the solo heard in Ein's theme is meant to be an interpolation of the solo in Ryu's theme. As such, it appears the entire point of these solos being so similar is to highlight the connection between Ein and Ryu as friends that the amnesiac Ein forgot in the game's storyline. The solo that is repeated in the same way in "The shooted" seems to represent who Ryu is, while the different interpolated versions of the solo in "Vigaku" may represent Ein trying to remember his past or Ryu's role in doing so. In Ryu's Story Mode, he knocks Ein out of the tournament, causing him to regain some of his memories including who Ryu is, and he eventually regains the rest of his memories after battling Kasumi at Ryu's request.