Kakak perempuan Tyas, bernama Sisilia Supriyadi, meninggal dunia
Amandine jadi bocah yatim piatu, karena ayahnya (Billy) juga sudah meninggaldunia setahun yang lalu.
Saat dikabarkan kakaknya meninggal dunia, Tyas Mirasih menuliskan seperti ini.
"A heart of gold stopped beating. Two shining eyes at rest. God broke our hearts to prove to us. He only takes the best. God knows you had to leave us, but you didn’t go alone, For part of us went with you the day He took you home. To some you are forgotten, to others just part of the past, But to us who loved and lost you, the memory will always last. I LOVE YOU TO THE MOON AND BACK KA @sisiliasupriyadi REST IN LOVE MY SOUL SISTER.," tulis Tyas Mirasih.(*)