Samidare and Suzukaze don't show up enough in these Shiratsuyu sisters' pictures. Darn different uniforms.

More like because of different artist. However, it's also thanks to the different artist that make Sami and Suzu so different from the other Shiratsuyus.

I get a feeling the original artist that did the first 5 would probably not used Blue hair...or not base both Sami and Suzu something KyoAni.

Monarchy

... let's hope I'm the only one around here who believes that Suzu in this pic is sort of similar to, of all things, Len'en's Kaoru :/