May 14, 2021 · Nami probably called Sanji with suffix -kun for the first time mostly for the reason number (1) as a response of him guarding her tangerine tree and calling her Nami-san (same case like Brook who calls all nakama with “-san”).

May 26, 2022 · It’s much more casual than san and is typically used for young or teenage boys—”Shinji-kun!” or “Kawaoru-kun!,” for example. However, you can use kun for a girl you’re very close to.

Nami calls him "Sanji-kun" because he calls her "Nami-san." In Nami case is a way to show affection to Sanji, she manipulate Sanji alot but she also have respect and affection for him.

Sanji is a simp, Nami knows it, and she's using "Sanji-kun" to imply emotional attachment and manipulate him for her own gain. If Nami had a cell phone, Sanji would be listed under "free dinner"

Mar 4, 2023 · Sanji also has the distinct honor te the only member of the Straw Hats whom Nami calls with a suffix, i.e. “Sanji-kun” (incidentally, Nami is the only girl to whose name Sanji adds “-san”). Nami was hurt by Sanji’s departure in the Zou arc and went to Whole Cake Island with Luffy to save him. Roronoa Zoro

Jan 19, 2012 · What she calls her crewmates: Sanji is "Sanji-kun". Everyone else is referred to by their first names, sans honorifics.

SaNami is the het ship between Sanji and Nami from the One Piece fandom. Sanji encountered Nami along with the rest of the Straw Hats in the Baratie. Seeing her for the first time Sanji declared his love for her, to which he gave her fancy food …

"Black Leg" Sanji[12] is the cook of the Straw Hat Pirates and one of the Senior Officers of the Straw Hat Grand Fleet. [5] . He is the fifth member of the crew and the fourth to join, doing so at the end of the Baratie Arc.

Sanji (サンジ, Sanji), born as Vinsmoke Sanji (ヴィンスモーク・サンジ, Vinsumōku Sanji) and also known as "Black Leg" Sanji (黒足のサンジ, Kuro Ashi no Sanji), is a fictional character in the One Piece franchise created by Eiichiro Oda.

Cause it fits in their dynamic, Sanji calls her Nami-san, but calls Robin "chan". If you want to view it positively : It's Nami's reward for a bazillion of things Sanji did to her. If you want to view it negatively : It's Nami's technique to make Sanji do stuff to her bidding.