If they were aiming for "slightly overweight", they kinda missed the mark.VOLCANA (Marsha Rosenberg)
The closest thing comics has to the "Big Beautiful Woman" archetype
Villain of: Nobody in particular
PL 10 (135)
ST 14/30 (+2/+10) DEX 14 (+2) CON 14 (+2) INT 10 WIS 9 (-1) CHA 9 (-1)
Bluff 2 (+1)
Diplomacy 4 (+3)
Drive 1 (+3)
Intimidate 5 (+4)
Notice 4 (+3)
Profession (Day Care Worker) 4 (+4)
Sense Motive 4 (+3)
All-Out Attack, Attack Focus (Ranged) 2, Dodge Focus 3, Improved Overrun, Power Attack
Alternate Form (Magma) 14 
AP: Alternate Form 11 (Volcanic Ash)
AP: Alternate Form 10 (Volcanic Rock/Basalt)
Force Field 6 (Extras: Impervious 4) (10)
"Volcanic Blast" Blast 11 (Feats: Dynamic, Improved Critical 2, Split Attack) (Extras: Targetted Area-Line, Penetrating) (Flaws: Touch Range) (38)
Dynamic AP: Magma Aura 6 (total 10)
Magma Aura 4 (16)
Immunity 6 (Fire & Heat Damage, Heat) (6) -- (70 points)
"Volcanic Ash Form"
Insubstantial 2 (10)
Immunity 8 (Fire & Heat Damage, Heat, Suffocation 2) (8)
Flight 2 (4)
Suffocate 10 (Extras: Area-Shapeable) (31)
AP: Obscure Visuals 10 -- (53 points)
"Volcanic Basalt Form"
Density 8 (24)
(Strength +16, +4 Toughness, +2 Immovable & Super-Strength)
Super-Strength 3 (heavy load: 24 tons) (6)
Protection 5 (Extras: Impervious 2) (7)
Immunity 12 (Fire & Heat Effects, Suffocation 2) (12) -- (49 points)
Toughness +2 (+8 Magma, +11 Basalt), Fortitude +5, Reflex +4, Will +3
Attack +7 (+9 Ranged), Damage +2 (+10 Ash/Basalt, +11 Volcanic Blast), Defense +7 (+9 Dodge), Initiative +2
Responsibility (Loved Owen Reece, aka Molecule Man)
Abilities: 10 / Skills: 24--6 / Feats: 8 / Powers: 72 / Saves: 9 / Combat: 28 (135)
-Volcana's a character that debuted in Secret Wars (alongside Spider-Woman II & Titania), but unlike the others, she never really stuck around as a major character. In fact, I'd never even heard of the character until I went on my first mass-purchase of old "classic" TPBs, and saw her in it. It's rather sad, because I kinda liked this character. Instead of your usual bodacious, arrogant babe, you had a weak-willed, mousy girl who was always nervous (ie. dork bait), hooking up with the nerdiest, skinniest guy around (again, dork bait), and she was a classic case of a "Villain who was secretly good". They could've gone places with this, but instead Marvel jerked Molecule Man between life & death a few times, Marsha broke up with him, and we never really saw much of her again.
-Her body just makes me laugh, though. Her own shyness, and comments from other characters, imply that she's supposed to be somewhat overweight. The artist clearly tried to 'show' this... by giving her huge breasts and super-wide hips, but giving her an identical waistline to all the other women. So instead of a slightly chubby girl, we have a super-tall Amazon with INCREDIBLE proportions, along with a perfect exaggerated hourglass figure. Yeah... that's not exactly what a "chubby girl" looks like in real life.
-Volcana's a fun little Alternate Form build. Her basic, most common form is her basic Magma Form, allowing her to be a Blaster-type with a really powerful Energy Aura. Two other Alternate Forms allow her to choke people or block their vision (Ash Form), or just be a PL 9 super-strong Brick (Basalt Form). She's far better off just sticking to her best power, though- a +11 Penetrating Line Blast is nothing to sneeze at.