This knife belonged to Lucien Vanserra, the emissary of Tamlin, the High Lord of the Spring Court.
History[]
A Court of Thorns and Roses[]
When Lucien told Feyre Archeron how to capture the Suriel to get an answer from him he told her he would be near in case she needed help, she just needed to scream.
Feyre was in the Western Woods of the court when she captured Suriel, and after obtaining the answers to her questions the Suriel heard the arrival of other faeries, some naga who had smelled the scent of Feyre. They tried to kill her and she screamed for Lucien to help her, but he never showed up. She managed escape two that were chasing her until Tamlin showed up and killed them.
Lucien later apologized to her for not coming when she called for help and to make up for it he gave her one of his favorite knives, with the hilt decorated with precious stones.