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

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

Artists

• aster_crowley
• aster_marion
• aster_pro

Characters

• aster_(asaneman)
• aster_(azil31)
• aster_(chapaevv)
• aster_(cxcxahxxves)
• aster_(darai)
• aster_(delbi3d)
• aster_(dima)
• aster_(drool_cutie)
• aster_(enigmasyndrome)
• aster_(glopossum)
• aster_(mewgle)
• aster_(milkiipetals)
• aster_(nu:_carnival)
• aster_(phatman1201)
• aster_(umbreon)
• aster_alabaster
• aster_faye
• aster_lobert
• aster_lyons
• aster_nova
• aster_rhodes_ravier
• aster_stennan
• aster_the_barista
• aster_vera
• aster_victini
• aster_von_snugglebeans

Misc

• aster_(flower) for the type of flower.

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