The death of a loved one leaves significant psychological and emotional pain for the bereaved family. If this pain is not overcome, it can lead to pathological conditions such as depression or prolonged grief disorder (PGD). The 'AI Deceased Memoral Service 'Soul Link' is an innovative psychological support service that can heal the psychological pain of bereaved families and help them recover their daily lives. It provides an interactive experience where families can engage in real-time chatting, voice, and video conversations with the Digital Twin created from the deceased. This service will lead a new culture of mourning. We leverage ‘AI Digital Twin’ & ‘Digital Mask’ technology to offer highly personalized contents, enabling users to gain psychological comfort through interacting with their beloved deceased individuals. -AI Digital Twin: Based on 1-5 photos of the deceased's face, a 30-second voice clip, messenger chat history data, and memories with family, an AI digital twin of the deceased is created. -Digital Mask: We have developed the 'Digital Mask', a high-definition facial video creation technology free from issues of Deepfake such as the Uncanny Valley and unnaturalness. (Key features of 'Soul Link') - Watching video letters: AI generates a video using a single photo and a 30-second voice clip of the deceased. Applying Digital Mask technology allows us to recreate a more natural appearance of the deceased's face. - Taking photos together: Multiple concepts of AI digital twin phototemplates are provided using 1-5 photos of the deceased's face. - Real-time 1:1 text&voice conversation: A highly personalized chatbot is developed based on the deceased's speech patterns, personality, and memories. - Letters to heaven: Using pre-life data of the deceased, handwritten replies are generated.