The Number on the Screen Is Not the Whole Mechanism
Sync Ratio Measures Access, Not Simple Piloting Skill
SPOILER!
A higher synchronization ratio means the pilot and Eva are more deeply connected, giving the pilot more immediate control and sensation.
That is not automatically good. Greater access also means greater vulnerability to pain, psychological feedback and loss of the boundary between pilot and Eva.
Why it matters
The same metric
NERV celebrates as performance can become dangerous when it climbs too far.
Cross-Synchronization Shows the Evas Are Not Interchangeable
SPOILER!
Episode 14 puts pilots into Evas that are not normally theirs. The experiment produces unstable reactions rather than proving that any trained child can operate any unit.
Why it matters
The pilot/Eva pairing has personal content.
NERV can test and manipulate it, but it cannot reduce the relationship to a standard cockpit.
Asuka's Falling Sync Ratio Is a Psychological Crisis Made Measurable
SPOILER!
Asuka experiences every decline in synchronization as proof that the identity she built around being the best pilot is collapsing. The lower number is both operational trouble for
NERV and a personal catastrophe for her.
Why it matters
Evangelion's interface turns emotional instability into a combat statistic without suggesting the emotion itself is merely technical.
Four Hundred Percent Means Shinji Crosses the Pilot-Eva Boundary
SPOILER!
After the
Zeruel battle, Shinji reaches a synchronization state in which his body no longer remains conventionally separate inside the entry plug.
NERV has to attempt a salvage operation rather than simply opening the cockpit.
Why it matters
The danger of synchronization is finally literal. The system that lets Shinji control
Unit-01 can also dissolve the distinction between them.