Thank you for reaching out to Extension! This is an early adult stage of a box elder bug. They will eventually lose the black jacket look and turn mostly black with orange-amber edging. Generally speaking, they don’t cause much harm to plants. They are a nuisance when they are close to the home and might try to overwinter there. They tend to gather in large numbers.  Here are some recommendations:https://ask2.extension.org/kb/faq.php?id=865848

If the liriope is close to your home, you need to take steps to prevent them attempting to gain entrance. Here is a great factsheet from Minnesota Extension: