japanese wn isekai as far as i can remember he's "reincarnated", not "transported" as demon lord he got maid knight (a) which is reincarnated several times, that maid knight (a) has someone she adored, which is also maid knight (b), and that maid knight (b) is a long lived human, and she fight the previous demon lord with (a), but (b) didnt remember (a) since (b) only know that (a) dead in that battle, but since then (a) reincarnated to the current (a) without (b) knowing he can create his own subordinate, and one of them is a man with "hero" class which is also loved by one of another his subordinate, and this subordinate also know maid knight (b) from previous battle (with previous demon lord) he got his own island to governor which is in that island only live demon one day a ship deserted on that island, and the crew shocked that in that island demons live peacefully he (mc) and maid (a) disguise themself as an adventurer and go to another country to gather information one day mc got attacked by a girl in a forest, that girl has bodyguard(?) 3 or 4 i think? which is also has strong weapon and represent color (RGB + white?) that girl lose and lost one of her bodyguard, but mc didnt kill her and offer her to work for him instead