Dear all,
Most of emojis have Neutral value as their East Asian Width properties at present. But I suggest they should be Wide or Ambiguous, because these emojis come from Japanese legacy proprietary character sets, and thus an emoji's frame is commonly square-shaped, as well as as CJKV Ideographs.
East Asian Width property affects rendering on terminal emulators. An emoji is as wide as a fullwidth character in most fonts but is treated as a halfwidth character in some environments, so that it can be rendered overlapped with another character.
Thanks, Ryusei YAMAGUCHI