The decision followed a drawn match in Exeter where Kildunne made 17 carries for 47 metres, averaging 2.8 metres per carry, which fell well below her usual standards.
The new selection, who grew up on a Devon sheep farm, is not a fan of the media spotlight, contrasting with Kildunne's higher comfort level in that area.
Kildunne's recent dip in form coincided with her managing new-found fame and a large public spotlight as a household name for the Red Roses.
Ellie Kildunne dropped to the bench as the Red Roses made six changes to their starting lineup for the upcoming fixture.
The tactical shift also introduces competition and emphasizes the need for consistency when competing within the squad.
During that fixture and a previous match against the same opposition in Exeter, the 27-year-old full-back was targeted by the opposing team.
The incoming player brings different attributes to the position, including a strong kicking game around the park and off the tee."She has got a monster boot round the park and off the tee and, while Sing might not score the same worldies we have seen from Kildunne, her highlights reel is none too shabby,"management said.
The coaching staff explained the reasoning behind the selection change to bring in a different profile at full-back."So I think it's time to give her an opportunity,"management said, adding that it is"important to create competition and to recognise that you have to become more consistent, especially when you're competing in the Red Roses.".