I have no idea. It depends on which comic universes or series you're referring to. Some might feature him, while others might not. You might need to do some in-depth research to get a definite answer.
I don't think so. I haven't come across Edwin Jenner in any of the comics I've read. But there are so many comics out there, it's possible he could be in some lesser-known ones.
Chapter 406, "Barely Considered Living", is the clearest early answer because it turns Living Yama's situation into a concrete plot event.
Chapter 506, "The Female Devil Can Die", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Nearly three teams had been squatting in surveillance outside the... and closes on The mantis stalks the cicada, unaware of the oriole behind..
Chapter 541, "Life Imprisonment as the Starting Point", is the clearest early answer because it turns Pei Ye's situation into a concrete plot event. It opens with The production team acted quickly, replacing one damaged drone with...
Chapter 473, "Little Hua? What a Joke!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. The chapter gives readers a real answer by opening on Su Yinwan completely fell apart after hearing the news in the shower,...
Chapter 625, "An Anonymous Corpse Found in the Wilderness?!", is the clearest early answer because it turns Found's situation into a concrete plot event.
Chapter 497, "Carefully Raised a White-eyed Wolf", is the clearest early answer because it turns Team's situation into a concrete plot event. A useful checkpoint is the way the scene starts with The setting sun packed up its last rays and tossed them into the...
Chapter 474, "Handcrafted Wooden Bed", is the clearest early answer because it turns Yu Li's situation into a concrete plot event. It opens with Although everyone besides Jiang Li and Shang Shuyue was red-faced and... and closes on He could drink himself to death in the glitzy Capital, but he....
Chapter 736, "When Will You Come to My House for Dinner?", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event.
Chapter 740, "Someone Who Can Live Through the Days", is the clearest early answer because it turns Fang Wenzhe's situation into a concrete plot event. The chapter gives readers a real answer by opening on Fang Kai sprang to life when he heard this, immediately setting his...
Chapter 495, "It's Not Too Much to Ask for Just a Thousand Points, Right?", is the clearest early answer because it turns Shang Shaojing's situation into a concrete plot event. The chapter gives readers a real answer by opening on Miss Su had done her homework before coming.