The anti-heroic protagonist of the series and a third mahai angyo onshi from the fallen kingdom of Jushin. Despite the common perception held by Jushin's former citizens that angyo onshi are virtuous and bearers of justice, Munsu usually comes across as somewhat amoral and does not believe in helping people who refuse to help themselves. When he does help others, his methods almost always involve excessive bloodshed, lying, torture, and other questionable acts.

Yoshina currently uses two techniques. His main offensive technique is "Melchsee's Lance". Yoshina creates a condensed sphere and releases it, relying on the indiscriminate targeting of "Melchsee's Door". Because the sphere is small, it gains enormous speed but loses a lot of power, which also is less taxing on Yoshina's mind. His second technique, "Melchsee's Vortex", can be used both offensively and defensively. Yoshina creates condensed spheres, each linked together with a line, allowing for greater control. In the defensive mode, "Melchsee's Vortex" forms a semi-sphere around him and absorbs all PSI attacks. In the attack mode, Yoshina breaks the chains linking the spheres and releases the spheres, causing them to splash around targeting PSI sources. He can also keep Melchsee's Door in one place by keeping it rotating, creating a flat disk used for close range offensive attacks.