Long List ahead.
Honoka: LLSIF Animal UR Side Story (Voiced) / VERY old Poster art / SIFAS Tap Dialogue (Voiced, no laugh)
Kotori: LLSIF and SIFAS Tap Dialogue (Voiced, LLSIF no laugh) / LLSIF Chapter 36 pt. 3 (Voiced, no laugh)
Umi: LLSIF Tap Dialogue (Voiced, no laugh) / LLSIF Chapter 21 pt. 3 (Voiced, no laugh)
Nico: LLSIF and SIFAS Tap Dialogue (Voiced, no laugh)
Nozomi: Unknown (STILL hunting for one)
Eli: Youtube Video "drama c" (Voiced) / SIFAS Story Chapter 6 pt. 1 (Voiced)
Maki: SIFAS Story Chapter 18 pt. 4 (JP only, voiced, no laugh) / SIFAS Tap Dialogue (no laugh) / SIFAS Daily Theater (Text only) / One of the School Idol Diary LN (Text only)
Hanayo: A bit hard to find, LL Secret Shortcut with Rin-chan and Hanayo (Text only) / LLSIF and implied SIFAS Tap Dialogue (Voiced, no laugh)
Rin-chan (My waifu): School Idol Diaries: Under the Starry Sky (LN, manga, voiced Event Story in LLSIF) / LLSIF and SIFAS Tap Dialogue (no laugh) / LLSIF "A Pleasant Trip Together" (Voiced) / LLSIF UR Side Story "Butterfly-like Ribbon" (Voiced) / SIFAS Nozomi Bond Story 3 (Voiced) / LLSIF 3rd Unit Single Promo SR Side Story (Voiced)
Aqours:
Chika: LLSIF and SIFAS Tap Dialogue (Voiced)
You: LLSIF and SIFAS Tap Dialogue (Voiced, LLSIF no laugh) / LLSIF Cat Cafe SSR Side Story (Voiced) / implied in full version of "Jimo Ai Mantan Summer Life" (Voiced)
Riko: SIFAS Tap Dialogue / LLSIF Cat Cafe SR Side Story (Voiced)
Dia: Implied through SIFAS Tap Dialogue
Mari: SIFAS Tap Dialogue (One of the better ones)
Kanan: SIFAS / LLSIF Tap Dialogue (Voiced, no laugh)
Ruby: LLSIF and SIFAS Tap Dialogue (Voiced, LLSIF no laugh) / VA tickled by others (easily findable) / Granblue Fantasy Collab MLB Tap Dialogue
Yohane: SIFAS and LLSIF Tap Dialogue (Voiced, SIFAS no laugh) / SIFAS implied through Initial SR Side Story / implied in full version of "Jimo Ai Mantan Summer Life" (Voiced)
Hanamaru: LLSIF Story Chapter 14 pt. 2 (Voiced, no laugh) / SIFAS Tap Dialogue / One of the School Idol Diary LNs (Text only) / "Numazu Sweets Hunting", Galaxy Hide and Seek Drama CD (probably the best one in LL)
Nijigasaki:
Kasumi: Confirmed, not ticklish (fake laugh)
Kanata: SIFAS Hot Spring Event UR Side Story (Voiced, very cute) / SIFAS Tap Dialogue
Karin: SIFAS Pool Event Story pt. 5 (Voiced, very cute)
Everyone else: SIFAS Tap Dialogue (Ai's is very cute as well)
Idolmaster:
(Cinderella Girls) Too many to name/Document, but these girls have some Tap Dialogue in some of their Cards (Voiced): Uzuki, Mio, Ranko IIRC, Anzu, Kirari, Shoko, Otokura Yuuki, Jougasaki Rika, Yumi, Hina, Anastasia, Kanako, Noriko, Miku, Chieri, Karen, Tada Riina, Miria, Airi, Takumi, Rika and others I forget atm
Shiki, Chie and Riamu through the little comics
Nao, Rina, and Mika were animated (Rin mentions Karen and Nao got her earlier)
Hiromi, Hotaru and Nono (in that video)
All of the ones I remember. Sorry for this obscenely long list