This is the form of the former hero who became the Demon King, without his armor.
Truth be told, he has no face.
After defeating the Demon King, the next day at camp or upon waking,
when he washed his face in the lake, it transformed into an inorganic, pitch-black face
with multiple golden, glowing eyes, sharp teeth like a beast's, and a tongue that seemed to reach the ground.
He hid his true face even from his party members.
After returning to town, he finally revealed his face to his only childhood friend, the party's mage (by then, his body's muscles and bones had grown too large to conceal his form).
Later, after his body fully transformed, when washing alone,
he would occasionally hold his own member, using its warmth
to distract himself from his loneliness...👿💦魔王になってしまった元勇者の鎧を取った状態の姿です実はいうと彼には顔がありません魔王を倒して以降、その翌日の野営か目を覚まして湖で顔を洗った時には、無機質で真っ黒な顔に複数の金色に光る瞳と、獣のように鋭い歯と、地面にまで届きそうな舌に変身し、それからパーティーの前でも素顔を隠していたそれから街へ帰った後、ようやく唯一の幼馴染のパーティの魔術師に自分の顔を打ち明けたらしい(その時には体の筋肉や骨格が成長し、自分の身体を隠しきれなくなっていた)その後、完全に体が変容した後、一人で体を洗っている時はたまに自分のイチモツを抱いて、その暖かさで少し寂しさを紛らわしているという…👿💦