That index is not notable by itself However including an index format for one off characters within this article is fine because this article is already notable and WP NO ILITY only applies to whole articles rather than specific sections or statements within an article For content there is WP N NCONTENT and this would not give undue weight to these characters Please stop removing the list of one off characters as there is no policy or guideline that supports you and the value of this list is supported by WP LISTS