Rei Yamazaki is a Animation Director that worked on Sun and Moon episodes near the end of the series. She made an appearance on POKENCHI 207 where she helped Shokotan with an important decision scene which was in the final episode of the Sun and Moon anime series.

POKENCHI 207 also correctly indicates the pronunciation of her name as Rei on the onscreen graphic. The Pokémon Company incorrectly romanized her name as Reina Yamazaki in the Movie 21 English dub credits.

Role	Media	Title
Animation Director	SM 69	Rise and Shine, Starship!輝け星舟テッカグヤ！Shine On, Starship Tekkaguya!
Animation Director	SM 75	Some Kind of Laziness!カプ・ブルル！ぐーたらモー特訓！！Kapu-Bulul! Intense Slacker Training!!
Animation Director	SM 86	I Choose Paradise!ココにきめた！ポケモン湯けむりパラダイス！！I Choose Here! The Pokémon Steam Paradise!!
Animation Director	SM 96	Don't Ignore the Small Stufful!ロケット団とヌイコグマThe Rocket Gang and Nuikoguma
Animation Director	SM 108	カプ・レヒレの霧の中でIn Kapu-Rehire's Mist
Animation Director	SM 118	最上階を目指せ！爆音のドラゴンジム！！Aim for the Top Floor! The Explosive Dragon Gym!!
Animation Director	SM 130	マオとスイレン！友情のゼンリョクバトル！！Mao and Suiren! A Fully Powered Battle of Friendship!!
Animation Director	SM 139	誕生！アローラの覇者！！He's Born! The Alolan League Winner!!
Animation Director	SM 146	ありがとうアローラ！それぞれの旅立ち！！Thank You, Alola! Respective Departures!!
Animation Director	PM2019 13	The Climb to Be the Very Best!サトシ対ダンデ！最強への道!!Satoshi VS Dande! The Path to Power!!
Animation Director	PM2019 22	さよなら、ラビフット！Farewell, Rabbifoot!
Animation Director	PM2019 30	Betrayed, Bothered, and Beleaguered!いやいやピカチュウ、やれやれバリヤードThe Reluctant Pikachu and the Exasperated Barrierd
Animation Director	PM2019 45	ソード＆シールドⅣ 最強の剣と盾Sword & Shield IV: The Ultimate Sword and Shield
Animation Director	PM2019 60	めざせネギマスター！つらぬけ騎士道！！Aim to Become Leek Master! Stay With Me, Chivalry!!
Animation Director	PM2019 68	ゴウにライバル！？　ミュウへの道！！Rivals for Go?! The Road to Mew!!
Animation Director	PM2019 71	Leaping Towards the Dream!/レッツゴー！プロジェクト・ミュウ！！/Let's Go! Project Mew!!
Animation Director	EVO 1	The Champion/ザ・チャンピオン/The Champion
Animation Director	PM2019 90	Showdown at the Gates of Warp!/冬ＳＰ第２話！ディアルガ＆パルキア！時空大決戦！！/Winter Special #2! Dialga & Palkia! The Decisive Space-time Battle!!
Animation Director	PM2019 99	Battling Turned Up to Eleven!/スパイクタウンのマリィ！/Marie from Spiketown!
Animation Director	PM2019 106	新番組！ロケット団ないしょ王国ラジオ！！/A New Show! The Rocket Gang Undercover Kingdom Radio!!
Animation Director	PM2019 111	モーンとリーリエ、雪原の再会/Mohn and Lilie: A Reunion on the Tundra
Animation Director	PM2019 118	サトシ出陣！VSダイゴ！！/Satoshi Heads Into Battle! VS Daigo!!