Raine Amou & Ryan Shima
Raine had met Alexander along with Ryan when he was a teenager, in German. They are friends when they went there as student abroad. He sad to hear that Raine's death and the missing of Ryan.
Genjuro Kazanari
Genjuro and Alexander was friend when Raine introduced him after Sky Feder was formed.
Tsukasa Amakawa
Tsukasa and Alexander are good friends since they were teenagers, they have been chatting online for sometime.
Alexander trusted Riki
Riki Ryugasaki & Rinne Utau
Alexander trusted Riki to take Regina along with him and take a good care of her. Alexander met Rinne for once when Tsukasa took her abroad in German, he also trusted her too.