I think they make that space look a bit busy, and they don't look too comfortable for extended periods of sitting. I would look for a comfortable club chair, possibly in leather, and angle it more in the corner of that space (removing the mirror). You could add a small table and perhaps a lamp next to it to create sort of a reading nook. Your room is very pretty, but I just don't think the two chairs you have there now are inviting enough for what appears to be a relaxed seating area.

Your other furniture gives a very comfortable loungy feel and these chairs feel stiff.
I too would choose a more comfortable chair, maybe even a recliner. Something like this. Fabric colors may not be right, but you get the idea.

I think they look good, but agree with others that they do not look comfy. If you just need extra seating on occasion these could work, and I like your idea of adding pillows.

I think they are nice, just not for where you want them. I see those chairs in a entryway or hallway. A place where you might sit just for a minute or two.

I agree to fluffier, more comfortable club chairs.

ETA Actually you might not need anything there as you have that large sectional.

Thank you all for your comments! They've helped me make my decision. I'm going to return them and get some cozy poufs instead. It won't be so crowded, will serve as seating or a foot rest, is more kid friendly and will still fill that empty spot a bit.

Are you sure that poufs will be as functional as a chair would be? I can't imagine adults sitting on them, and will you have to pull them back and forth to the couch when a footrest is desired? I think a large, upholstered ottoman that could do double-duty as a coffee table would be ideal in your space, and still like the idea of comfy club chair in the corner by the fireplace -- but only you can know how you truly want to use this space.

I LOVE those chairs!! But not there. I’d keep them for sure tho. For another space. In your room which is sooo pretty btw. And you Totaly do know what your doing.... I’d do two benches flanking the FP and a coffee table/ ottoman/ pouf. You really don’t need a lot in here. The rug is beautiful too!! Absolutely honestly LOVE this room