include comment author in 'Notify of new replies'

I'm sorry but this is not an easy task. You should find some developer for this custom PHP code.

It could be customized without help.

    /**
     * notify on comment new replies
     */
    public function notifyCommentSubscribers($parent_comment_id, $new_comment_id, $email, $postId) {
        $emails_array = $this->dbManager->getNewReplyNotification($parent_comment_id, $email);
        $subject = ($this->optionsSerialized->phrases['wc_new_reply_email_subject']) ? $this->optionsSerialized->phrases['wc_new_reply_email_subject'] . ': "' . get_post( $postId )->post_title . '"' : __('New Reply', 'wpdiscuz');
        $message = ($this->optionsSerialized->phrases['wc_new_reply_email_message']) ? get_user_by('email', $email)->display_name . $this->optionsSerialized->phrases['wc_new_reply_email_message'] : __('New reply on the discussion section you\'ve been interested in', 'wpdiscuz');
        foreach ($emails_array as $e_row) {
            $this->emailSender($e_row, $new_comment_id, $subject, $message);
        }
    }