The Sun Social Link in Persona 3 Reload is represented by Akinari Kamiki. He is one of the easiest Social Link in Persona 3 Reload to Rank Up, but you'll have several tasks to complete before you can unlock Rank 1. Akinari's Social Link is also easy to miss if you're not checking the areas around Tatsumi Port Island. However, given the simplicity of maxing out the Sun Social Link, it's one you'll want to complete on your first playthrough for the gameplay perks.