YOU SAID:
Harper is the bestest friend ever! I like hanging out with her / them.
INTO JAPANESE
ハーパーは最高の友達です!私は彼女/彼らと一緒にいるのが好きです.
BACK INTO ENGLISH
Harper is the best friend! I like being with her/them.
INTO JAPANESE
ハーパーは親友です!私は彼女/彼らと一緒にいるのが好きです.
BACK INTO ENGLISH
Harper is best friend! I like being with her/them.
INTO JAPANESE
ハーパーは親友です!私は彼女/彼らと一緒にいるのが好きです.
BACK INTO ENGLISH
Harper is best friend! I like being with her/them.
That didn't even make that much sense in English.