The Temperature of the Heart.On the 48th Floor, Kirito meets Asuna's friend Lisbeth in her blacksmith shop to request a custom-made sword. Lisbeth is shocked when she finds that Kirito's current sword, Elucidator, is durable enough to destroy the strongest sword she has ever forged, and persuades Kirito to take her to the 55th Floor to get a rare mineral from a crystal dragon, so that she can use it to make an even stronger sword. They arrive at the 55th Floor and find the rare mineral inside the deep pit of the crystal dragon's nest. During their time together, Lisbeth develops romantic feelings for Kirito, which are strengthened when Kirito defeats the crystal dragon and escorts her to safety. Lisbeth uses the rare mineral to forge a new sword for Kirito named Dark Repulsor. As she then attempts to confess her love to Kirito, Asuna arrives and interrupts them. Lisbeth becomes heartbroken and runs away, quickly realizing Kirito and Asuna having mutual strong romantic feelings for each others. Kirito later finds Lisbeth at a riverbank and thanks her for the time that they spent together. In turn, Lisbeth welcomes Kirito to her blacksmith shop anytime he needs to stop by.