Most characters are equilateral squares. The codepoints which are mapped to something else are the following:

" " (U+20): No path but full advance

p "p" (U+70): Path has 0 ascent but full descent

É "É" (U+C9): Path has 0 descent but full ascent

横 "横" (U+6A2A): Thin horizontal stripe and full advance

橫 "橫" (U+6A6B): Thin horizontal stripe and full advance;

縦 "縦" (U+7E26): Thin vertical stripe and full advance;

縱 "縱" (U+7E31): Thin vertical stripe and full advance;

纵 "纵" (U+7EB5): Thin vertical stripe and full advance.