aespa - 2 Song Band LIVE Study: 'Thirsty' & 'Spicy' (it's Live)

I think (don't know) they have the band in the background, because the focus should be on the group singing! As an SM Entertainment group, they are guaranteed to have good to great vocals. As much as I love their title tracks, it's too bad they can't always showcase their great vocals on them. As Dani pointed out, the Kwangya songs are definitely songs that showcase their vocals a little more than the title tracks after the Kwangya era.

I was hoping they'd have a "killing voice" with their comeback with "Lemonade," but I think Lemonade is a less vocal song. Maybe with their next comeback. Before joining SM, Giselle sang in the choir as an alt. Her solo songs are also more focused on singing than rapping (although she's one of the few SM idols who became rappers because they actually wanted to, not because someone had to rap).