As a showcase that the Intelligent Devices aren't merely AIs that follow their masters' bidding, Raging Heart takes the initiative in protecting Nanoha by surrendering a Jewel Seed to Fate, whose Bardiche was at scythe form poised at Nanoha's neck.
Minor, but after Nanoha won her true battle against Fate, not only did she retrieve her in the water, she also took Bardiche too.
Chrono promising Nanoha that he'll do his best to see that Fate isn't punished for what Precia forced her to do. Becomes even more Heartwarming in Hindsight since Fate becomes his little sister at the end of A's.
Likewise, Lindy offering to adopt Fate in the third Sound Stage.