Harem

Already in the Harem

Yoruichi Shihōin - Kitty

Tatsuki Arisawa - childhood friend and former karate partner.

Mizuho Asano- is the older sister of Keigo Asano.

Orihime Inoue - big boobs

Rukia Kuchiki - Not enough love been shown to her in other fan-fiction

Working Towards

Ikumi Unagiya- is the owner and manager of the Unagiya Shop in Karakura Town, a business which performs a variety of odd jobs for its customers.

Haruko - Haruko is a citizen of Karakura Town. She is a Human who possesses spiritual power.

Riruka Dokugamine - a Fullbringer and formerly member No. 003[1] of the organization known as Xcution.

Kirio Hikifune - is a former captain of the 12th Division and a member of the Royal Guard

Isane Kotetsu - She cannot sleep after getting a nightmare

Rangiku Matsumoto - "A voluptuous beauty with an adult charm in the Gotei 13 Squads.

Soi fon - can someone say threesome

Senjumaru Shutara - is a member of the Royal Guard, holding the title "Great Weave Guard"

Retsu Unohana - 5th best girl

Mashiro Kuna - Mashiro kick

Lisa Yadōmaru - Schoolgirl

Kūkaku Shiba - foursome

Tier Harribel - sweet and sexy

Nelliel Tu Odelschwanck - 3rd best girl

Candice Catnipp - is a Quincy and a member of the Wandenreich's Sternritter with the designation "T" - The Thunderbolt.

Nozomi Kujō -is a Mod-Soul who has escaped from Soul Society and is wanted by Kagerōza Inaba.

Senna - is a Shinigami that Ichigo Kurosaki and Rukia Kuchiki meet in the Human World.

And here's some others that may join the Harem but I'm still not sure

Yoshino Sōma

Hiyori Sarugaki

Homura - is the elder sister of Shizuku. Her name was given to her by Rukia Kuchiki.

Nemu Kurotsuchi - Lieutenant Kurotsuchi Nemu is an artificial entity created from the Gigai technology and Gikon technology by Captain Kurotsuchi.

Rurichiyo Kasumiōji - is the leader of the Kasumiōji Clan, as well as a central figure in the Kasumiōji Conspiracy.

Yin and Yangare - two loyal Arrancar girls who served Sōjirō Kusaka during the events surrounding his unusual revival and subsequent assault on Soul Society.

Bambietta Basterbine - is a Quincy and a member of the Wandenreich's Sternritter with the designation "E" - "The Explode".

Karin Kurosaki - is the fraternal twin sister of Yuzu, daughter of Isshin and Masaki Kurosaki, and younger sister of Ichigo.

Yuzu Kurosaki - is the fraternal twin of Karinand the younger sister of Ichigo Kurosaki.