Soul Energy Research

Soul Energy Research studies the special energy emitted from the soul to increase the maximum amount of soul energy that is the basis of the Soul Reaper.
 * [Level 1]: up to 8 soul energy maximum.
 * [Level 2]: up to 11 soul energy maximum.
 * [Level 3]: up to 14 soul energy maximum.
 * [Level 4]: up to 17 soul energy maximum.
 * [Level 5]: up to 20 soul energy maximum.