Try "¯\\_(ツ)_/¯", escaping the backslash with another backslash. A single backslash here just escapes the _ underscore, which can be used in place of the * asterisk for emphasis.
The rendering inside backticks, <pre> or <code> blocks converts backslashes to yen symbols for me too (when using double-backslash for escaping).
Thanks for reporting this issue.
I've changed color for :visited links (it will be slightly lighter - this is pattern we usually use on SE sites) but I haven't added :hover effect for :visited links. It might be bug (or feature request) but it's the same across whole network at the moment (I'm not saying it's ok) so updating it might be kinda tricky and ...
Editing tags doesn't count towards the "at least 6 characters" rule (unfortunately). So the answer is actually the same as on the linked question "Edits must be at least 6 characters", why?
I'm afraid this rule will continue to affect you for another 6-8 weeks or so, until you have gained enough reputation (now 2000) to "Edit Questions and Answers"...