Spoilers
The novel is more detailed so she comes across as more caring and outgoing. She's not ment to be someone who looks charming, in the novel no one's like attracted to her charm or anything. Jae chan im pretty sure is supposed to look more attractive than her cause he alot of people like how he looks. But for now here She's only been introduced. Once she comes to the center she's more relevant. But, in the second life she's not a love interest although jae chan does have moments of jealousy cause he belived they were lovers. (technically she wasn't in the first life either, they were faking it). In the second life she's actually more attached to jae-chan and only admires woojin. She's a good person and jae chan becomes a good mentor to her in the center. Woojin also doesn't slow much intrest in her in this life.
Bigger spoiler
The reasons woojin looks at her in awe is because she actually looks exactly like his dead mother. He's not in love with her and never was. He did care for her cause she reminded him of his mother. But woojin was always in love with jae chan.
Oh I don't think I quite understand what you mean. But I don't think you're supposed to feel jealous of her for the mc. To put it simply the girl just isn't ment to be seen as a love interest or someone to be jealous of by readers. She's there as one of the misunderstandings the mc has about his past life.
Spoilers
In the novel I personally find her likeable and the mc does too. That's the problem for mc tho she's likeable, kind and caring. Someone who the mc sees as being good fit for woojin. In contrast the mc was obsessive, cruel and mean to ml in the past. To mc he feels like she's a good fit for ml, that's why he tries to get them together. There are moments where mc feels jealous but like as readers by now in the novel it's pretty obvious that woojin has no intreast in the girl and only has eyes on mc. Mc can also tell woojin isn't showing intrest in her the same way as in the past life which he tries to mend but keeps failing. that's why I personally don't feel any jealousy towards the girl nor do I think she's ment to be portrayed in that way. Like there is zero spark between the ml and the girl something the mc doesn't understand why. Other than the initial moment of awe for the ml because the women looks like his mom.
Bigger spoiler
There's a part where mc tries to get the girl to be the ML's official guide but the ml refuses. Throughout the guide match test the mc is jealous but he thinks it's for the better. When the ml refuses despite having a better match rate with the girl than mc. Mc doesn't understand why but as readers we know it's cause ml likes him. Mc is just too caught up in the past.
She rather dull to me, it should be the girl next door type effortlessly charming. Are we supposed to be jealous of her for MC? I don’t know maybe in the novel she came across more pretty. MC POV he thinks she is everything that he doesn’t, but that just his inner saboteur. I not convinced ML charmed by her in previous TL