Ok, I'm wrong (but so are you), multicharacter character literals are cursed anyways. https://onlinegdb.com/sfxg6T53t

#include <stdio.h>
int main()
{
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
    puts("Little endian");
#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
    puts("Big endian");
#else 
    printf("ayo wtf %d\n", __BYTE_ORDER__);
#endif
    printf("%#b", 'twinspin6');
    return 0;
}

main.c: In function ‘main’:
main.c:12:19: warning: character constant too long for its type
   12 |     printf("%#b", 'twinspin6');
      |                   ^~~~~~~~~~~
Little endian
0b1110000011010010110111000110110