Only a couple of things, as my fandoms need more love. Or at least in some cases, my characters do.

Devlin
Sins of the Fathers/Virtues of the Sons (http://www.fanfiction.net/s/4648480/1/Sins_of_the_FatherVirtues_of_the_Sons), great fic.
Kapaychan's art (source of some icons): 1 (http://kapaychan.deviantart.com/art/Protection-152129541) 2 (http://kapaychan.deviantart.com/art/Big-Happy-Family2-154535827) 3 (http://kapaychan.deviantart.com/art/Kiddie-Trio-165671849) 4 (http://kapaychan.deviantart.com/art/Moar-Sketches-170646352) 5 (http://kapaychan.deviantart.com/art/Varied-176488592) 6 (http://kapaychan.deviantart.com/art/The-Other-Ken-10-178119218)
A family photo with a hell of a story (http://dinilahi.deviantart.com/art/BEN10-A-Photo-148900014)
Manga style with bro (http://rokusuketanaka.deviantart.com/art/BEN10-Former-material-KEN10-131480307)
A hint of future plans? (http://starrrtt27.deviantart.com/art/I-m-still-part-of-him-174352267)

Tenaya
Something Entirely Different (http://www.fanfiction.net/s/4975920/1/Something_Entirely_Different): More of a Ziggy fic than a Tenaya fic, and written when the series first premiered, but still good.
...And since there's so little stuff, how about some scans of the UK RPM comics (http://www.facebook.com/album.php?aid=169254&id=66429284752&ref=mf)? Or pics of her actress dressed as Wonder Girl at San Diego Comic Con (http://www.facebook.com/album.php?aid=231729&id=66429284752&ref=mf)?

Ren
Has nothing, sadly. There's less love for Ryuki than for its American adaptation, Dragon Knight.