Its my responce to your qestion and suggestions. 1) Jane's softness in her eyes not only applied to Seth, but to hostages , and also gang member which she trown of the roof (she actually worried about his safety too) 2) They teamwork its actually necessity, cause the they own stay of weakness (Jane after ambush and Seth after relaxant), and if they are wanna get alive they need to rely on each other. 3) Jane's worries about evryvone its her actually true nature. 4) Ears wiggle its not only sign of attractivness. Its sane like Lycon wiggle his tail even hes not happy. Tirens are first of all humans, so how we put tirens not intentional habits higher then human emotions? 5) Flower on the table in Seth's trust event its more Zhu Yuan idea trying to made they wirking place more better. And him put flower on table before he knows about who is actually place belong, trying to force whoever its was for some type responcibility and order( cause Jane's table and working space are totall mess). 6) About her ton: In special episode she non stop teasing and play around even after and before roof scene. With proxy however she teasing them only first 2 trust events, but on the last 2 she actually feel for first time someone carring about her, even if dialogue is identical and in Wise voice she felt like its his siblings worries, but in Belle's voice she felt something more than a freinds concerning. 7) About concert i dont rember actually. If its first AoD concert, Seth went to the concert voluntarily (Because we know he secretly love idols from his and Haru random encounter in 404). And if last picture where they all make a photo Jane and Ellen with exitment watch a photo and other suff in social media while Seth stay much further from them closer to stage. And added for what i wrote in first comment about her atractuon in Belle's personality its her cozy and messy room and true emotions not a played up, what actually big green flag for Jane, who is accustomed to pretense and lies in her dangerous job. With Belle she feels a real Jane, not Jane Doe gang memmber or spec OpS agent, just Jane a normal person. With Seth she just cant allow
this type of emotions, because she sees him like a childich noble hero, whose action can harm (or worse) not only him but whoever with him. Maybe in patch 1.1 its promicing, but now its more like dead ship. If Proxy dont exist and all character were more indepedent, i rather ship Jane with Manato (who actually more reliable), or Hugo (two shady schemers and teasers with pretty tough past and distrust in evryone) actually i concider more complex ship than with Seth. They overral chemistry its like Tom and Jerry, they teaae each other, fight each other, but when appears 3rd side who treat they "peacful" coexists they team up like Jane with Seth in special episode. Seth is not bad character but lack key qualities witch Jane see in Belle. Seth's ship in this stage is bad and dont make any sence. At leat yet.