Just some things to keep in mind. I might add extras if necessary.
Some things will change from canon so events won't exactly align.
Alfia and Meteria joined the Hera Familia when they were 10. Alfia and Hera had the same agreement where Alfia would join so long as Hera gave Meteria a blessing as well. Alfia as of the trailer is high level 2 and both are 12 years old.
Silver is 13 and a level 1 supporter with Zeus. Silver and Meteria aren't official boyfriend and girlfriend, but they do have strong feelings for each other, the girl was just teasing them. Alfia is aware of this and tries to push him away.