Ariana Ursua, a 30-year-old freelancer from Hawaii, told the New York Post that her friend had a “very distinct way of messaging.”

Hannah Kobayashi’s disappearance remains a mystery as her family and friends desperately search for answers piecing together what happened to her and what may have led to her radio silence.

Hannah Kobayashi, a Hawaii woman, disappeared days after she missed her connecting flight to New York City from Los Angeles on Nov. 8