Mylas is a kind-hearted young merman who wishes to sample life outside of Hydropolis, but his mother forbids him from leaving. Go inside of the building right next to Mylas to speak to his mother, who agrees to let him come to Evermore, but one on condition. She wishes to make a new outfit for him and wants you to retrieve the materials. She wants three bolts of seraphic silk, which you can get from the Wondrous Bazaar (tier 3 facility), Bountiful Bazaar (tier 3 facility), Thriving Bazaar (tier 2), or Bustling Bazaar (tier 2). Once you have enough, bring them to Mylas’ mother to finish the sidequest.