Since Stan Lee wanted "The Fantastic Four" to be driven by familial connections rather than action, the primary impetus for Susan Storm's creation was to not only be a full member of the team, but also the female lead (with Reed Richards a.k.a. Mister Fantastic being the male lead) of the series. He eventually emphasized this to readers explicitly, with a story in which the Fantastic Four read fan mail denigrating the Invisible Girl's value to the team, and respond by enumerating some of the occasions on which she played a key role in their victories. Teammate Johnny Storm a.k.a. the Human Torch being Sue's little brother became one of several sources of tension within the group, and she also served as the center of a love triangle with Reed and the Fantastic Four's sometime ally, sometime enemy Namor. Sue was initially presented as the sole reason for Ben Grimm, a bad guy, remaining on the group, which was significantly toned down in the published series.