I'd definitely make it possible to decline friendship and rivalry with the battle junky 😙
I kept picking the No option every time, but just like always declining is sadly not an option 😔
This. I thought I was gonna like Nemona, but the "takes you under your wing because she knows more than you do and then makes it so that you can't say no without her kicking up a fuss" aspect of her character was a massive turn-off, not to mention kind of triggering. Let's just say I was "friends" with a person like her for a long time (the quotation marks are there because there's no way I would consider them a real friend now) and I'm still dealing with the aftermath of it. I don't outright hate Nemona and I respect those who believe she means well despite her pushy attitude, but I don't see her in that good of a light either due to my past experiences.
Penny is an interesting look at the effects of school bullying and I can relate to her somewhat on her avoidance of conflict and nerdiness... except that I don't have the same manipulative edge that she does. I mean, she basically railroaded the player character into cleaning up her own messes! I don't think her bullying even begins to justify what she did, and I'm still a bit ticked off that the Star Bosses forgave her so easily, let alone that she's considered a friend to the player character in the post-game. Again, I was also close to a person (different from the one above) like this once, and leaving them behind felt like a weight off my chest.
That leaves me with Arven, whom I have... mixed feelings about, to say the least. I'm not going to vote for any of the three "friends," but if I did, I'd likely go with him. He is the only one of the three that develops along his storyline and the most pleasant to be around once he opens up to you, but putting up with his initial haughty attitude and disdain of your 'Raidon is... a doozy. Looking back after the ending, there's also a very high chance that the apple will not have fallen very far from the tree - and considering how much I hate both of his parents, it makes me not want to get too attached to him. I'm thinking that perhaps I'm being more lenient with him because I watched a playthrough of the game, but if I actually did play it myself, I might have given up on him as soon as he scoffed at Miraidon. No one messes with my cyborg dragon baby.
To sum up... none of them convinced me. That "treasured friends" Tauroscrap with the picture in your dorm died in Area Zero for all I care. Give me a picture with my Mons!