Unfortunately there has been no word of this beautiful little feline since last year. Sadly it seems that ILLEL is indeed missing.
As the owner, you can officially mark her as missing -- her page remains live and if she does surface at any time in the future, her recovery can still be logged.
If you aren't familiar with how to mark a bug missing - there is a dropdown beside 'Recalculate distance' on your travelbug's page. Use this dropdown and you will see the option to 'Mark bug missing'
Fingers crossed that she does turn up one day. We have seen other lost bugs mysteriously show up again.