How do I add/upload images to a character's wiki page?
I would suggest checking the
Busts page first and see if the image isn't already uploaded--or if the image is out of date, you can go to the image's page and upload a new image for it.
To upload a new image, just click the
Upload file link on the sidebar, then upload your new image. Be sure to categorize it with the proper tags so it will automatically go where it belongs, and add any extra info if you think the image needs it. You now have a new image page. Use the name of that page as a link to the image on the page you want the image to appear.
If you need examples, you can go to an existing page, Edit it (but don't save any edits you make), and look at how it is set up. Some pages use a tabbed format to allow multiple variants and some just use a simple link. Use your best judgement and choose what works best for the page. Also update any extra captions or any related info to the image where possible.
Also remember to preview your changes to make sure nothing broke before you save any changes.
If something is off, I or another contributor may do a quality control pass. I know I'm not super active with changes or updates, but if there is a need for it and I can spare the time, I don't mind correcting things for consistency.