In her final form she fuses with all her fairies and gains a divine golden dress and seven pairs of luminescent wings!
The others get equal power ups to keep it fair.
Ichigo gains mastery over his mixed spiritual energy with his bankai unleashing the full potential of his human, shinigami, hollow and quincy abilities. He wears
this, his body has undergone
this transformation, but with two horns and Tenza Zangetsu looks like it did when he kicked Aizen's ass.
Setsuna and Konoka make a permanent pactio so that Setsuna can summon forth a powerful sword with a blade of pure holy light that can she can reshape at will, and she embraces and controls her demonic lineage and gets a nifty stat boost because that just happens in shounen stories.
Konoka just realises the full potential of her latent massive magical power that they talked about once or twice, but the series never got around to really show it off.