After coming to Elina's rescue following Echidna's betrayal, she takes her to her personal quarters to recover. When she receives word that Elina's finally regained consciousness, she briefly loses her composure, and rushes to her side; briefly stunning Elina with her display of emotion.
A particularly poignant moment is when Claudette carries Elina out of the arena, after she's defeated by Leina. When Elina utters Leina's name instead, Claudette doesn't flinch, despite her own heartbreak.
Claudette looks after her during her bout of depression, while perfectly aware of what's caused it. Regardless of her own feelings of bitterness and jealousy toward Leina, she resolves to defeat Leina and bring her home for the sake of Elina's happiness.
Then, in chapter 28, Elina finally learns about Claudette's feelings for her, thanks to Leina. Which is also when Claudette finally realizes Elina had feelings for her after all. While they don't officially become a couple, it definitely counts as a happy ending for both of them. Especially Claudette.
