Mantis was slightly difficult to pin down. she's well trained as a fighter, but she usually chooses not to fight. i may have relied a little too much on her future-views ability in her specials, but they seemed to fit. a mostly defensive character, and the only AO i have in the bunch. i couldn't think of any better wording for the IA.
fennshysa - i know 1 special is the same art as your Kang special, but i couldn't find a lot of art for her that i liked.
(http://img02.deviantart.net/3a97/i/2017/088/4/5/9_mantis_by_justaopfan-db3zait.png)
Avoiding The Worst (AO) Negates the effect of any 1 Special card played by Opponent.
http://img10.deviantart.net/91b0/i/2017/075/8/a/avoiding_the_worst_by_justaopfan-db2js1m.png
Celestial Madonna (CG) [OPD] Play during battle. For remainder of game, if Mantis is Spectrum KO'd, the last character to attack her is also immediately KO'd.
http://img15.deviantart.net/6f22/i/2017/075/6/c/celestial_madonna_by_justaopfan-db2jryd.png
Empathic Telepathy (NF) [OPD] For remainder of game Mantis may play any Power cards usable by non-KO'd teammates for defense only.
http://img03.deviantart.net/ed67/i/2017/075/8/1/empathic_telepathy_by_justaopfan-db2jrvz.png
Guardian Counselor (FH) Acts as a level 2 Intellect attack. If successful, remove all hits with an Intellect icon from Mantis and teammates.
http://img10.deviantart.net/edf9/i/2017/075/1/b/guardian_counselor_by_justaopfan-db2jru5.png
Knowledge Is Power (BY) [OPD] Opponent must immediately discard all cards with an Intellect icon currently placed or in hand.
http://img09.deviantart.net/4bab/i/2017/075/7/a/knowledge_is_power_by_justaopfan-db2jrsa.png
Possible Futures (AJ) Opponent must reveal 2 cards from hand chosen at random. Discard 1 card of Opponent's choice. Return other card to hand.
http://img08.deviantart.net/56d5/i/2017/075/8/3/possible_futures_by_justaopfan-db2jrq3.png
Strength Of Will (FP) Acts as a level 6 Fighting attack. If successful, Opponent must discard 1 Artifact card of Opponent's choice. Card may be placed, in hand, or in play.
http://img13.deviantart.net/56d1/i/2017/075/0/d/strength_of_will_by_justaopfan-db2jrnk.png
let me know what you think.
edit 3/29: grid updated base on comments from OP3 on deviantart.