Here are Jake's Harem who will be reacting to him in the multiverse first:

Team RWBY

Joan Arc

Nora Valkyrie

Pyrrha Nikos

Lin Rin

Coco Adel

Velvet Scarlatina

Penny Polendina

Mane 6

Sunset Shimmer

(A/N: More audience will appear in later chapters. Stay tuned for the first chapter.)