We're not ready for Imu to look like Nami.
Nami = Wave
Umi = Sea
We've yet to see red haired Nami too AFAIK....Shanks mother? Lol.
That silhouetted woman singing when Shanks ranted to Green Bull could be a Nami face but she had light hair?
*edit* I meant this lol, wrong page, context, whatever:
No silhouetted but her eyes are hidden ofc. Very nami-vibes imo.