Roseate, known as Rose, is a Generation II Core introduced in Portal 5. She is very optimistic and kind. She was installed as a 'Motivation Core'. Mac falls in love with her. She was deployed in the West Wing of Aperture following her reassignment, and when that part of the facility was sealed off, she was trapped in a small test chamber for quite a long time. However, she doesn't seem any worse for wear at all once she is found, due to her roseate attitude.