She also retains her hairstyle from the end of Dragon Ball Z.
When Krillin was killed by her brother, due to 's control, Android 18 emotionally cries over her husband's death despite being a cyborg and admitting she loves him as she shows her vengeful rage to her brother for what he had done.
To achieve this look yourself, you can dye and style your own hair or shop for a wig.
Android 16 tells 18 not to worry, and that Cell is holding back his blasts to avoid killing her, as he would never risk his dream of perfection.