Aha! Time travel—still transmigration.
Aha! There's a name - Dahlia Dursley, who looks a bit like Thalia - wait, Dursley! ?
Aha! It's a magical world!
Aha! It's my dear cousin - Harry Potter!
Aha! Hagrid! So high! So strong! Pink umbrellas are so interesting!
…
Welcome to the adventures and life of a pseudo-Muggle!
Mission: Courage and love - magic will be made between us.