"merle" can refer to a number of characters and other things. Check the current list of merle* tags to see if there is a more specific one that fits what you are trying to tag.

merle can also refer to a fur color pattern on domestic dogs, often seen as black spots on gray or as brown spots on tan. The tag for this specific pattern, if any, is not yet determined, as of 2024-06.

Some of the more popular tags from that list include...

Characters

• merle_(tsukune_minaga)
• merle_nyalentine
• merlebirb
• merle_highchurch
• merlee

...but check the complete list if the one you want isn't listed here.