User blog comment:IamJakuhoRaikoben/Chapter 471: Until the Battle is Done, Review./@comment-25111584-20160201211822/@comment-5303512-20160201220938

Wendy in DF mode has flash step speed that can basically blitz anyone. And Dimaria was focused on killing Chelia that she didn't noticed Wendy coming in at super speed.

Besides, I doubt a kick like that can really damaged Dimaria at all, surprised and moved her back yes, but not injuring.

Plus Seilah was already weakened and tired after having portion of her power taken by Mira and left her fatigued for Elfman to use his powerful brute force.