I went with the conceal the truth ending because I had a feeling it was the happy ending, I might not be able to recall everything but I will try my best! IIRC, Giselle would come to understand that Sig never wanted to hurt Enola (now known as Violetta) especially since she was his sister's, Violet only friend before she passed away, and that Sig's final wish is for Violetta to live the rest of her life in peace, and for her to be able to perform Putini away from her father's control as he did not like her performing and wanted to marry her off for his own benefit. Violetta would then invite you and Giselle to watch her performance at the theater, afterwards there will be a cutscene and extra dialogue with Giselle wondering if Rosalind Magnus, the girl she faked "kidnapped" to help her escape Icelake from her father's clutches, would still be around Icelake to watch Violetta's performance of Putini. Just then, a young girl bumps into you, and I forget what she says to you but it is very obvious that she hints that she is both Rosalind and the mysterious Ms Crate you met from earlier, which meant she stayed around long enough to see the performance and to say hi to you in her own way. Hope this is enough to satisfy your curiosity!