Mozu and Kiwi
Also known as: Square Sisters (スクエアシスターズ)
Mozu and Kiwi are inseparable from Franky—they're basically always at his side. You'd recognize them pretty easily by their distinctive square-shaped hairstyles, which is where the "Square Sisters" nickname comes from. Mozu's the one in yellow (bikini top and slacks with straight-edged hair), while Kiwi rocks red (top and bikini bottom) with curly-edged hair.
They have this habit of mirroring Franky's reactions and mannerisms, which plays into how devoted they are to him. Both sisters also tack "Waina" onto the end of basically every sentence—it's just been their thing since they were kids.
In combat, they wield samurai swords, though they're not exactly formidable fighters. Franky and Kalifa took them down without too much trouble, which tells you they're more about loyalty than actual fighting prowess. There's also this quirk where they walk sideways during strong winds, mainly because their square hairstyles would otherwise get blown back completely.
Content compiled by AnimeList.moe from publicly available sources.
