Tatsuhiro Nome Edit
The two are best friends, having a deep relationship with each other. It was shown that the two met even before the auditions for B-Project.
Tsubasa Sumisora Edit
Out of all the B-Pro idols, he was the first one to enthusiastically introduce himself to Tsubasa. He does treat her well.
Kazuna Masunaga Edit
Hikaru is very fond of Kazuna, and the two are band-mates.