Phantom Girl
From superman.nu: Supermanica
Phantom Girl
Phantom Girl (Tinya Wazzo) comes to 30th century Earth from the planet Bgtzl of the 4th Dimension, which co-exists, un-perceived, in the same space Earth occupies! Phantom Girl is a member of the Legion of Super-Heroes, and because she is "four-dimensional", she can project herself into phantom form and pass through three-dimensional matter (Adv No. 316, Jan 1964: "Origin and Powers of the Legion of Super-Heroes").