I honestly think that Jinsoul is the most talented singer in Loona. Haseul is amazing, and Chuu is very stable, but Jinsoul excels so much at so many different techniques while still having such a powerful voice. Her runs are so clean, her vibrato is perfect. She's always practicing and improving her voice.
It's missing quite a few strong moments, like Chuu singing 'Tears' by So Chan Whee like it was just a game to her, although most idols struggle to sing it. Chuu, Yves and Kim Lip on Masked Singer were pretty phenomenal too, lots of great belting.