This is the Tearlaments Havnis from YU-GI-OH!
good at: 0.7 - 1
Tags (character): Tearlaments Havnis, mermaid,
Tags (body parts): blue nipples, hair over one eye
Tags (body parts extra): bags under eyes, freckles, white colored skin
Tags (clothes): blue dress, silver tiara, blue detached sleeves, calf fins, sleeves past fingers
Tags (weapon): holding sword, sword, dual wielding
Tags (others): tears, underwater, bubble, blue theme, sparkle, water