Context: Luft Weizen ルフト・ヴァイツェン, a general in charge of the Angel Troupe space fleet, talks about how he has never met the imperial prince whom they protect.
ja - same as the da だ copula, typically used by old men.
{washi ya Enjeru-tai} nimo, {kono fune ni notte} kara wa ichido mo atte wa kudasaranu...... ワシやエンジェル隊にもこの船に乗ってからは1度も会っては下さらぬ・・・・・・ {Me and the Angel Troupe}, since {boarding this ship} [he] hasn't met even once...... (literally.) Not even once {since boarding this ship} [he] met {me or the Angel Troupe}......
atte kudaranu - archaic form of atte kudasaranai 会って下さらない, negative form of:
atte kudasaru 会ってくださる To meet. (honorific, used when someone superior does something for someone inferior, like the prince meeting with him, which would be an honor.)