
Sorry for only replying now, this week has been disaster for me. Okay, I saw this spoiler from someone's comment who read the (light?) novel.
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The silver haired boy she saw from the window at her birthday party, he's going to appear soon. I think Ahin was his name, well from mangreru's translation. Chapters' way ahead there, just backread on the comments here someone provided a link. I only read here because the translation there seems formal and awkward for me.

OMG, why Dranste?(╯°Д °)╯╧╧ i think Asisi is the best one for her, and HE NEEDS LOVE...(づ ̄ ³ ̄)づ
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SPOILER ALERT....(〜 ̄△ ̄)〜
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he has suffer way too much, and he loves Ria hole heartdly... Dranste otherwise is full of him self, and i dont see that he would really love her, plus remember he has something weird with Caistel, like if he wranted some powerfull sword for him to get the kingdom in exchange of his soul, but Caistel sayd he would give the kingdom, for a moment i though he would be fit for Ariadna but the more i read about him, the more i see he is just messing with the people in that casttle... AM SORRY I THINK ASISI AND ARIADNA WOULD BE PERFECT(づ ̄ ³ ̄)づ
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PLEASE LET ASISI BE HAPPY FOR ONCE!!!! ヽ(`Д´)ノ

She's not going end up with Dranste, silly. Well as far as I could see, that is... I only said I wanted her to end up with him or Asisi.
Dranste has this mischievous charismatic side that I really like and Ariadna takes no bs from him. Their dynamic is interesting too. He also discreetly helps her with Caitel so I don't think he's that bad. Funny how he hasn't read her thoughts about her being reincarnated. It's too bad they rarely interact though
As for Asisi, he's so sweet and loyal to Ariadna. After seeing his past, we all the more want him to be happy. We can see protecting Ria and being by her side is his happiness. He's like a broken puppy we want to love and protect. The thing is he seems pretty satisfied with their current relationship so it's unlikely for him to pursue romance with her later, especially with his self-esteem issue.

She's not going end up with Dranste, silly. Well as far as I could see, that is... I only said I wanted her to end up with him or Asisi.
Dranste has this mischievous charismatic side that I really like and Ariadna takes no bs from him. Their dynamic is interesting too. He also discreetly helps her with Caitel so I don't think he's that bad. Funny how he hasn't read her thoughts about her being reincarnated. It's too bad they rarely interact though
As for Asisi, he's so sweet and loyal to Ariadna. After seeing his past, we all the more want him to be happy. We can see protecting Ria and being by her side is his happiness. He's like a broken puppy we want to love and protect. The thing is he seems pretty satisfied with their current relationship so it's unlikely for him to pursue romance with her later, especially with his self-esteem issue.

She's not going end up with Dranste, silly. Well as far as I could see, that is... I only said I wanted her to end up with him or Asisi. I'm allowed to have an opinion, don't I?
Dranste has this mischievous charismatic side that I really like and Ariadna takes no bs from him. Their dynamic is interesting too. He also discreetly helps her with Caitel so I don't think he's that bad. Funny how he hasn't read her thoughts about her being reincarnated. It's too bad they rarely interact though
As for Asisi, he's so sweet and loyal to Ariadna. After seeing his past, we all the more want him to be happy. We can see protecting Ria and being by her side is his happiness. He's like a broken puppy we want to love and protect. The thing is he seems pretty satisfied with their current relationship so it's unlikely for him to pursue romance with her later, especially with his self-esteem issue.

Just like you said she wasn't going to end up with Dranste meian never said that they thought she was going to, either. They were simply wondering about why you would make him one of your choices.
Also, Dranste knows she's reincarnated. That's why he said her blood allowed her to remember her past life. I just don't know if he knows she's from another world entirely.
It's already spoiled who will she be ending up with.
*slight spoiler*
I wanted her with Dranste or Asisi in the future since it's sorta weird for her to be catching feelings to someone who's mentally younger but oh well...