I'm a Holofags only who sometimes watch NijiID once in a while. it doesn't stop me from wanting to know about other chuuba outside hololive though i didn't really watch them. I used to read a lot of wikis back then when I'm still new. I'm trying to name all Niji members on the pic based on my knowledge, no cheating so here we go

row 1
skip-levi elipha-ars-skip-skip-skip-skip-gilzaren-skip-skip-skip-skip-skip-masaru
row 2
kyoko-maimoto-hoshimi-skip-ririmu-skip-skip-emma-skip-miyuwu-lize-hakase-deron-tokyoghoul-hayamarin
row 3
eru-mao-naraka-xia-ibrahim-chima-melissa-kouichi-skip-skip-skip-Hada-fuwa-siu lee-skoy
row 4
skip-Honma-hina-hayato-gaku-skip-skip-skip-skip-aki-morinaka-skip-yukishiro-rindou-shiina-skip
row 5
akane-skip-skip-bobon-nara-skip-pomu-skip-alice-shibuya-jura-skip-tojiro-skip-skip
row 6
ange-ratna-skip-suha-skip-nui-mugi-chae-louise-hisupi-moira-skip-bora-yuuhi-wosemi lovecock
row 7
skip-Patterson-tamaki-skip-cia-skip-skip-layla-HSKW-skip-skip-chigus-HAHAHAHA-skip-usami
row 8
roa(rip)-dola-fumi-etna-tomoe-eli-kanda-kohaku-skip-finana-skip-amyamya-skip-sakura-sango
row 9
jukut-youko-hana-gwelu-skip-furen-claire-rion-ZEA-ryushen-elira-chihiro-kenmochi-nagisa-sasaki
row 10
iroas-belmond-skip-utako-skip-warabeda-kanae-rai-naruse-skip-skip-leos-aiba-derem-azuchi
row 11
roha-akina-setomiya-hayase-eka-skip-evans-ebio-uzuki-haruka-karuta-harusaki-nagao-gundou-skip
row 12
toko-mashiro-yashiro-siskae-chiho-skip-kaida-kataribe-skip-skip-yumeoi-kirame-rin-debi-joe
row 13
yorumi-shellin-axia-mito-ejak-taka-gura killer-skip-gaon-hanabatake-mayuyu-mikeks-shibe-skip-skip