Mercury Seven summon the last group. The tests included spending hours on treadmills and tilt tables, submerging their feet in ice water, three doses of castor oil, and five enemas. Six candidates were rejected as too tall for the planned spacecraft. Another 33 failed or dropped out during the first phase of exams. Four more refused to take part in the second round of tests, which eliminated eight more candidates, leaving 18. From the 18, the first seven NASA astronauts were chosen, each a "superb physical specimen" with an IQ above 130, and the ability to function well both as part of
Seven of Seven The ending theme is "Birdie, birdie" by Nana Mizuki. "Sgt. Frog"s manga artist, Mine Yoshizaki, created the character concept designs for "Seven of Seven". As such, various crossovers exist between the series. The character of Mutsumi Hojo, who appears as "Examinee 623" and the host of his own radio program in "7 of 7", is a major character in "Sgt. Frog". Melody Honey, a minor character in "Sgt. Frog", appears and even receives a backstory. "Yuurei"-chan also appears in episode 12 of "Nana". In addition, episode 89 of Sgt. Frog features a plot that splits Corporal Giroro into seven personalities,