What should I call my little sister now to give her a warm impression? According to the network search results, there are several names to consider. One is "little sister", which is a popular name in picking up girls. It can show respect and kindness [1]. In addition, you can also use some sweet words, such as "dear" and "baby", which will give her a warm impression [3]. Of course, everyone's preferences are different, so it's best to choose the right name according to the specific situation. I hope these suggestions will help you!