Sif: From Old Norse Sif, which meant "bride, kinswoman". In Norse mythology she was the wife of Thor. After the trickster Loki cut off her golden hair, an angry Thor forced him to create a replacement.
Chaser smiles and gives you a textbook friendly expression, throwing a compliment in on the first sentence. It's not genuine coming from them.
Chaser offers you a gift, bragging about how precious and rare it is. You don't believe a single word, but a gift is a gift and it's always nice to receive one.