Here are the link for all the customisation guides I was  able to do:

Asuna

Sinon

Daisy

Leafa

Yui

Lisbeth

Yuuki

Silica

Muskeeter X

Kureha

Itsuki

Zeliska

Kirito

LLENN

Fukaziroh

Strea

Shirley

Pitohui

Clarence

Eugeo

Alice

Lievre

SAO FATAL BULLET CUSTOMIZATION GUIDES