Habanero-tan and her companions with names like "Jalapeño-san" are the personification of spices as cute young girls.
They were created by several Japanese amateur artists, and of them, Takehiro "Shigatake" Shiga, the creator of the character Habanero-tan, drew a series of yonkoma manga featuring the lives of these girls.
Shiga later became the graphics designer for the Vanillaware games Odin Sphere and GrimGrimoire.
[1] Habanero-tan's popularity has led to various renditions (some of them risque) by other Japanese artists, and even appearances on the OVA Netrun-mon.
There is also a dōjin game called Habanero-tan House which incorporates many of the things seen in Shigatake's comics.