Favorite Actors/Characters?

Who are some of your favorite actors and/or human characters in Toho's science fiction films?
I'll mention mine, and although the examples I give are both from Showa Godzilla movies, feel free to discuss anyone appearing in any of Toho's genre films from any era.
Mothra vs Godzilla
Good lord, just about everyone in this fantastic film is at the top of their game. Akira Takarada, Yuriko Hoshi and Hiroshi Koizumi have wonderful chemistry as Sakurai, Junko and Professor Murai and are probably the most appealing human protagonists to ever appear in any Godzilla movie. Emi and Umi Ito (as Mothra's fairies of course) are great here, and this is probably my favorite of their three appearances. Their rendition of The Sacred Spring and Mothra's Song are hauntingly beautiful.
Speaking of appealing, Yoshibumi Tajima and Kenji Sahara as Kumiyama and Torahata are two of the best bad guys in any Godzilla movie, second only to the extraterrestrial I'm going to mention in a bit. Even all the actors with secondary or bit parts play their parts well. There really isn't a bad character in this movie.
Monster Zero
I never got into Akira Kubo's Tatsuo character, but everyone else puts in another fine performance. Nick Adams as Glenn is a performance that's so memorable and classic that even his dialog is something every Godzilla fan knows and has no doubt referenced many times. Adams has good chemistry with Takarada (Fuji) and they play off each other well. But no one this movie beats Kumi Mizuno as Miss Namikawa and especially Yoshio Tsuchiya as the Controller. Mizuno is just incredibly hot in the movie and Tsuchiya just relishes his role making him the most iconic bad guy from any Toho film.
So, discuss...
I'll mention mine, and although the examples I give are both from Showa Godzilla movies, feel free to discuss anyone appearing in any of Toho's genre films from any era.
Mothra vs Godzilla
Good lord, just about everyone in this fantastic film is at the top of their game. Akira Takarada, Yuriko Hoshi and Hiroshi Koizumi have wonderful chemistry as Sakurai, Junko and Professor Murai and are probably the most appealing human protagonists to ever appear in any Godzilla movie. Emi and Umi Ito (as Mothra's fairies of course) are great here, and this is probably my favorite of their three appearances. Their rendition of The Sacred Spring and Mothra's Song are hauntingly beautiful.
Speaking of appealing, Yoshibumi Tajima and Kenji Sahara as Kumiyama and Torahata are two of the best bad guys in any Godzilla movie, second only to the extraterrestrial I'm going to mention in a bit. Even all the actors with secondary or bit parts play their parts well. There really isn't a bad character in this movie.
Monster Zero
I never got into Akira Kubo's Tatsuo character, but everyone else puts in another fine performance. Nick Adams as Glenn is a performance that's so memorable and classic that even his dialog is something every Godzilla fan knows and has no doubt referenced many times. Adams has good chemistry with Takarada (Fuji) and they play off each other well. But no one this movie beats Kumi Mizuno as Miss Namikawa and especially Yoshio Tsuchiya as the Controller. Mizuno is just incredibly hot in the movie and Tsuchiya just relishes his role making him the most iconic bad guy from any Toho film.
So, discuss...