Thanks! Your new version is working nicely for me now.

BTW, I found by experimenting that it seems to work fine for my simple needs even without xargs:

~/pm/Tux$ echo -e '\U1F468\U1F3FD\U200D\U2708\UFE0F' | xargs ./uchar -v
👨 U1f468 \N{MAN}
🏽 U1f3fd \N{EMOJI MODIFIER FITZPATRICK TYPE-4}
‍ U0200d \N{ZERO WIDTH JOINER}
✈ U02708 \N{AIRPLANE}
️ U0fe0f \N{VARIATION SELECTOR-16}

~/pm/Tux$ ./uchar -v '\U1F468\U1F3FD\U200D\U2708\UFE0F'
👨 U1f468 \N{MAN}
🏽 U1f3fd \N{EMOJI MODIFIER FITZPATRICK TYPE-4}
‍ U0200d \N{ZERO WIDTH JOINER}
✈ U02708 \N{AIRPLANE}
️ U0fe0f \N{VARIATION SELECTOR-16}

Update: Note that \U1F3FD (🏽) is EMOJI MODIFIER FITZPATRICK TYPE-4 : skin color modifier character representing skin type 4 from the Fitzpatrick scale, used above to change the skin color of the airline pilot. Also used by Discipulus to change the skin color of man student at Re: Emojis for Perl Monk names (Discipulus and SpaceCowboy and LanX).

👁️🍾👍🦟