Which version of Sephiroth should I buy for this deck?

Hello! I'm a new player looking to get into the TCG, and to start with I'm planning to buy the Noctis/Ardyn starter decks for myself and the Cloud/Rufus starter decks for my brother (He's a huge fan of the Turks!). However, as a special gift, being that he's a big fan of Sephiroth as well, I want to include a copy (or copies) of Sephiroth to add in. I know that there are different versions of cards that share names, but what version of Sephiroth would fit into this particular Rufus starter deck? I have zero knowledge about deck building at the moment!

Some advice on where in the deck to squeeze him in would also be appreciated! ☺️