Previous studies on the bereaved families of suicide survivors have rarely examined the family perspective. Therefore, one of the objectives of this study was to understand the complicated grief of the bereaved families of suicide survivors, as well as the personal reflections on post-traumatic growth. This single instrumental case study adopted the interpretive phenomenological analysis, and the participant was a granddaughter whose grandfather died by suicide. This study concluded that the family members’ complicated grief were as follows: (1) Out of concern for the reputation of the suicide survivors and the family, the elders of the family concealed the true cause of death from outsiders and younger family members; (2) The family fell apart after the grandfather’s sudden death; (3) Family members showed an unusual fear of death after the grandfather’s suicide; and (4) Family members committed suicide again, accelerating the family’s division. Based on the above results, this study discussed as follows: (1) Once the patriarch of a family died by suicide, the entire family may become a unit affected by complicated grief; (2) Suicide that damages the family’s reputation deprives grandchildren at the lower ranking of the family hierarchy of their right to know and their grief; (3) Being implicated in the complicated grief of family elders can more easily aggravate the complicated grief of grandchildren; (4) Preventive measures must be taken from the perspective of repairing family relationships to reduce suicidal thoughts and actions among the bereaved families of suicide survivors; (5) The post-traumatic growth of the bereaved families of suicide survivors can be sublimated by reconstructing spiritual beliefs, establishing continuous bonds, and finding action goals to bring hope to life. This study also had some limitations and future suggestions, hoping to provide a guide for helping professionals when they want to serve the bereaved families or individual survivors of suicide.