Concept sketches for a set of characters known as the "Tenki no Yousei" (天気の妖精). They're for an anime-inspired story I wanted to make called "Yume Shounen". I want the series to be drawn in a 90s anime art style and have a bright and vibrant palette. (I've tried drawing anime before, and I always end up reverting back to my Western cartoon style; hopefully someday I can actually set myself to draw the "Yume Shounen" cast in the anime style I envision them in)
From top/left to bottom/right:
Amemiya Haru (春雨宮; Haru Amemiya): Amemiya's name contains the kanji for "rain", and his surname means "spring".
Taiyouchou Natsu (夏太陽蝶; Natsu Taiyouchou): Taiyouchou's name contains the kanji for "sun" and his surname means "summer".
Kazamidori Aki (秋風見鶏; Aki Kazamidori): Kazamidori's name contains the kanji for "wind", and her surname means "fall/autumn".
Yukihiko Fuyu (冬雪彦; Fuyu Yukihiko): Yukihiko's name contains the kanji for "snow", and his surname means "winter".
Also, without looking in the tags, see if you can guess who I based the "Tenki no Yousei" on.