I’ll be borrowing the method from Weekly’s Overwatch calc and this is my first ever attempt at an ice calc so please bear with me.
I don’t want to waste time and space explaining where I got the numbers below so if you have questions please ask them in the comments and I will answer ASAP. The character's canon height is 160 cm.
Pig Section = 557.29 cm x 227.8 cm x 413.62 cm = 52509332.82 cm^3
Underneath Pig = 431.19 cm x 141.7 cm x 370.21 cm = 22619691.43 cm^3
Wings =
31.5 cm x 65.1 cm x 216.7 cm +
31.5 cm x 65.1 cm x 162.52 cm +
31.5 cm x 65.1 cm x 128.5 cm +
31.5 cm x 65.1 cm x 96.59 cm +
31.5 cm x 65.1 cm x 48.3 cm =
1338274.697 cm^3
Then double that since there are two wings
2676549.394 cm^3 + 52509332.82 cm^3 + 22619691.43 cm^3 = 77805573.644 cm^3
Volume of Sculpture = 77805573.644 cm^3
Accounting for 50% hollowness
77805573.644/2 = 38902786.822
Mass = Volume x Density
Density of ice is 0.9167 g/cm^3
38902786.822 x 0.9167 = 35662184.6797 g or 35662.1846797 kg
Density of frozen nitrogen: 1026.5 kg/m^3
Mass of ice trap: 70097.5729383 kg
Specific heat of nitrogen: 1040 j/kg
Freezing point of nitrogen: -210 C
Melting point of nitrogen: -196 C
Temperature (outdoors): 16 C (The series takes place in Tokyo and she can do this on a summer beach. Summer temperatures in Tokyo typically reach this temperature)
Q1 = MC(Delta T) = (35662.1846797 kg)(1040j/kg)(-196-(-210)) = 519241408.936 joules
Fusion energy nitrogen = (Mass of nitrogen)(Latent heat fusion) = (35662.1846797 kg)(25702j/kg) = 916589470.638 joules
Q2 = (35662.1846797 kg)(1040j/kg)(16-(-196)) = 7862798478.18 joules
Vaporization energy nitrogen = (35662.1846797 kg)(199190j/kg) = 7103550566.35 joules
Q1 + Fusion + Q2 + Vaporization = 519241408.936 + 916589470.638 + 7862798478.18 + 7103550566.35 = 1.64021799241 J, 1.6e+10 Joules or Large Building level