The term bestie is often used to describe the intimate relationship between two people. There are many different pen names to describe this relationship. Here are some possible four-word pen names: 1 Zining 2 Menglin Dream Butterfly 4 Purple Clouds 5 Yuyan 6 Xinyi 7 Siting 8 Mengfei 9 Zi Xuan Xue 'er These pen names were only for reference. He could choose a pen name that suited him according to his preferences.