To Obtain Emizel's Epilogue you must:
1) Complete the first 9 episodes
2) In Episode 10 Complete Stages 1-6. DO NOT COMPLETE 10-7 which is the final stage
3) If you haven't done so already, call a Senate and unlock the "Legendary Tree" Evil Symbol and place it somewhere on the map in Cam-pain so all squares are visible. The Pattern is +.
4) Go back to Base and Save your game. You have multiple slots so what I did was save the game in slots 1-5. Only one epilogue can be unlocked perm playthrough which is why we use multiple saves
5) Go back to the Cam-Pain
6) Place Valvatorez on the L square and Emizel on the one of the other 2 squares. The middle DOES NOT count.
7) Hit LT or whatever button it is to "Dispatch an evil deputy" and walk up to the Legendary Tree and hit the Action button to interact. Set Emizel to "Rival"
8) Go back to the Base and Save your game to one of the 5 Slots you saved Earlier but ONLY ONE. (You can also change your save icon in settings to the character you doing the Epilogue for in Settings to make it easier to identify saves)
9) At this point Quit and load up one of the other saves and repeat steps 5-8 for each character. So once you are done, you will have 5 Saves with all 5 characters set up at the Legendary Tree. Skip if done already through another Epilogue Guide
10) Now each character has a specific requirement to unlock an event needed to get the epilogue. Check each characters achievement for their individual task. Emizel's is to attack him 10 times with Valvatorez and have him Counter attack.
11) Remove all Weapons and equipment from Valvatorez to lower his ATK. Load up Episode 1-1 and bring out Valvatorez, Emizel and a Healer
12) With Valvatorez attack Emizel and he will counter, Use EXECUTE not END TURN. Only 1 Counter will count per turn. Once they are done use the Healer to heal Emizel to full health and repeat 10x. Emizel will take more damage each time so he will likely die eventually. Just complete the stage, heal at the infirmary and relaunch it.
13) Once you have had him counter 10x go back to Cam-Pain and you should get a prompt that an event has occurred under the Tree. Click through the prompts to go through the scenes
14) Now Complete 10-7 and you should unlock the Epilogue after the Credits.
15) You will be prompted to Save after the Epilogue. You can choose to do so if you wish. Obviously only save to the dedicated save for that character if you do.