I guess Ooi isn't counted for things like this any more.
Ooi will notice it even if Kitakami doesn't want her to. So it's safe to assume that we're talking about someone other than Ooi-chi
Truly marvellous♡Kitakami unexpectedly fusses about her style.But for all that, if some people notice, she is satisfied.Oh, blue today? Suits you.Really? Thanks!What colour should I use today, I wonder?Shipgirls' Daily Life 6Author: Yuuji
Illustrator: KoujiAnd yet, few people know about it.