Remove shadows, bottom border line around gravatar

Thank you Anna B,

Use following CSS codes, Please navigate to Dashboard > Comments > Settings > Styling admin page put it in “Custom CSS Code” textarea.

How can I remove the shadows

#wpcomm .avatar{
   box-shadow:none;
}

Also, how do I change the link color on the Privacy Policy link for GDPR?

#wpcomm .wpd-field-label a{
   color:#0074B3;
}

bottom border line around the Gravatar

I’m sorry, but I don’t follow you. Please explain using some screenshots.

Thank you!

I meant the line under the role of the avatar. I just used this to remove both the role as well as the line:

#wpcomm .wc-blog-guest .wc-comment-label {
visibility: hidden;
}