[Tsuna x OC] - Hitman's Little Dawn

The daughter with obsidian hair and eyes from her father, along with the elegant facial and doey eyes from her mother. After her mother, Yuna the Moon Arcobaleno, has passed away while her father, Reborn the Sun Arcobaleno, named his little girl, Aurora Sinclair, or Auras. Aurora was a child prodigy who graduated with a master's degree at the age of two. She took over as the Moon Arcobaleno right after she was done with her degree.

When the adults left for a mission that leads them to be the Arcobaleno's Curse, she went missing for 11 years with no memories as she suddenly ended up in Japan, founded by a woman with the name of Sawada Nana. The kind mother brought her home to meet her son, Sawada Tsunayoshi (who was 3 at that time), and adopted her as her own daughter, naming her as Sawada Auras.

The only thing that Aurora remembers is the warm, callous hands and curly sideburns of a fedora wearing man and a chameleon. One day, she finally meets an infant that oddly seems to resemble a lot like the man in her memory. That day, she soon became Tsuna's Moon Guardian while finding her lost memory.