When Junichiro beats Saionji with a single punch, although granted, in order for that to happen Ell had to supercharge him full of energy by kissing him.
When, for the first time in her route, Ell fights back against Remi, instead of merely defending. She never wanted to because Remi was still her sister, but when said sister tries to kill Junichiro... The Oh Crap in Remi's voice at the sight of Ell's Tranquil Fury says it all.
The team's combined efforts in taking Giant!Saionji down, especially the teamwork between Ell and Remi who show what happens when they combine their powers instead of using them against each other.